The date (year, month, day) of your birth.

For answer to this question 4 columns are allocated. The day of birth is written in the column "9a", the month - in "9b" and in the year of birth is written in column "9c".
Example: if the interviewee was born in August 25, 1954, then in the column "9a" 25 must be written, in "9b" - 08 and in "9c" - 1954.

In the column "9d" the age written by years should be filled in.
After writing down the year of birth, without any additional questions, using "Finding out the age by the year of birth with an additional chart" (Appendix 1), the interviewer finds out the person's age by the filled in years and writes it in the "9d" column. For the above mentioned example "57" should be written.
Besides, in the chart the following fact must be taken into consideration: the age of those who were born from January 1 to October 11 is written in the first column and in the second column the age of those who were born from October 12 to December 13. For the children under the age of 1 year old "0" is written in "9d" column.

3. Birth date:

(5) Date of birth _ _ _ _

Column (5): Date of birth
Try to obtain as much specificity as possible. Identification cards are very helpful. If the interviewees have one, write down the date of birth figuring on the card in the appropriate grid.
The numbers corresponding to months are:

Example: for March 1982, write down in the grid 0382. For a birth date of "around 1954," write down 1954 in the grid.
In the case where the interviewee presents no identification documents, politely ask the following question "what is your date of birth?" Write down the answer in the same manner in the designated grid.

Now we would like to ask for information on you and the persons habitually living in your household or currently residing in your home

(5) Date of birth

Column (5): Date of birth
Ask the following question: "In which month and year is [the respondent] born?" Report, in the grids, the number corresponding to the month and to the year declared. For the year of birth, write down the full year number.
Try to obtain as much specificity as possible. Identification cards are very helpful. If the interviewees have one, write down the date of birth figuring on the card in the appropriate grid.
The numbers corresponding to months are:

Example: For March 1982, write down in the grids |0|3| |1|9|8|2|. For a birth date of "around 1954," write down in the grid |9|8| |1|9|5|4|
In the case where the interviewee presents no identification documents, politely ask the following question: "In which month and year was [the respondent] born?" Write down the answer in the same manner in the designated grids. If the person has no information on his/her birthdate, leave the grids empty.

Questions 1 [order number] to 12 [residency status] apply to all persons to count in the household.

5. Date of birth

The date of birth of an individual indicates the day, month, and year of the birth. There are individuals who know their exact date of birth. There are those who do not know the complete date of birth but could at least recognize the month and year of their birth.

To gather information relative to an individual's date of birth, proceed as follows by asking the following question: [Q]: "Do you know the exact month and year of your birth?" If the answer is "yes," ask the interviewed person to tell you the month and year of their birth and register this answer in the appropriate boxes:

Example: for a person born in October 1970,
Write down 10 in the two upper boxes [month] and 1970 in the four lower boxes [year].
Calculate the age and write it in the boxes reserved to this effect in column 6.

If the person does not know their date of birth, ask if they possess a civil status document, and identification card, a passport, a driver's license, or any other official document that could indicate the date of birth. If the answer is "yes," ask them to produce the document and use it to report the month and year of birth in the appropriate boxes.

In the case where the person only knows their year of birth, write down the year in the appropriate boxes and write down "98" in the boxes reserved for the month.

If the person does not know their date of birth and has no document that can provide information on the date of birth, in this case, ask if they have an idea on their age. If the answer "yes," write down their age in the boxes reserved to age transcription in question 6, then calculate the date of birth as the difference between the observation date and the age of this person. Then write down "98" in the boxes reserved to the transcription of the month of birth.

Date of Birth or Age

P06. Date of birth

What is [person]'s date of birth? Write the month and year of birth.

P07. Age: If the date of birth is unknown, what is [person]'s age in full years?

Date of Birth or Age

P06. Date of birth

Column 7 and 8: Date of birth:

Mark the month of birth in numbers in column 7 and the year of birth in numbers in the column 8.

[Month numbers and examples omitted]

If someone doesn't know their month of birth, mark a line in column 7 and mark their year of birth in column 8.

If someone doesn't know either their month of birth or their year of birth, mark a line in column 7 and 8 and go on to column 9

Date of birth:
The date of birth of an individual indicates the day, the month, and the year of their birth. There are individuals who know the exact date of their birth, there are some who do not know the full date of their birth but know at least the month and the year of their birth.

The age of an individual is the number of years lived by this individual since the day of his birth to today.

The age in years passed expresses the number of whole years lived by this individual since his birth. The age that will be considered is the age in years passed

If we do not know the exact date of birth of an individual, but only the year of his birth, calculate the age at the birthday reached in the year by calculating the difference of years. As such, a person who was born in 2000 will be 5 years old in 2005, meaning he will have reached his 5th birthday in 2005.

All persons should respond to R1 through R7.

R4. Age
Age should be based on Gregorian calendar instead of lunar calendar.
For babies, if younger than ten months (including ten months), age = 2000 - birth year;
If older than ten months (eleven or twelve), age = 2000 - birth year - 1.
[omitted the details of age conversion between lunar and Gregorian calendar.]

5. What is your date of birth and age (in full years)?

Question 5. What is your date of birth and age in full years?
For question 5, you will record the day, month, and year of birth, as well as their age, by asking the person the day, month and year of their birth, as well as their age.
Next, verify that the age stated matches with their stated date of birth by consulting the "Conversion table for birth dates to years on the day of the census" which appears in Annex 1of this manual.
This is one of the most important pieces of information in the census; do not to forget to consult said Annex. For those who are less than 1 year old, write 0/0/0 in the boxes for age.
If the person does not remember their date of birth, you will record their age in full years in the corresponding box, placing dashes in the spaces for day, month and year.
If the person does not even remember their age, you should refer to historical events to help them determine their age, for example:
In general people who do not remember their age tend to give numbers ending in 0 or 5, saying they are 20, 65, 80 years old, etc. In those cases do not put those ages, instead you will ask the person again to better clarify their stated age, thus avoiding the error created by the tendency to state ages ending in those numbers.

Historical events
Second American Occupation - 1906
Start of the economic boom - 1915
Bankruptcy of the banks - 1920
Fall of Machado - 1933
End of World War II - 1945
Triumph of the Cuban Revolution - 1959

22. Date of birth or age

To complete the inside of the questionnaire, you must have:

- Read and fully understand the contents of this manual.
- If any points are unclear to you, ask your team leader for an explanation.
- Know the definitions perfectly and the meaning of the abbreviations used.
- The presence of the person you are surveying to obtain reliable information. If the head of the household is absent, speak with his representative to get the necessary information.

[p.32]

- Ask each person to be surveyed to present an identification document (national identification card, birth certificate, passport, driver's license, etc.) in order to quickly obtain answers to questions regarding first and last names, date of birth, etc.

Carefully follow all instructions you have been given, especially regarding how to ask the questions.

Question 22: Date of birth or age

Try to obtain as much precise information as possible (day, month, year). Check the civil status documents of the interviewed individuals, if they have any. The statement "around 1945" must be replaced with "1945" on the household questionnaire.

Do not convert an age into a year of birth: if you are told "42 years old," write "42 Y."

If the surveyed person has no idea of their age (or is too vague of an idea), ask them to show you someone who is in their age group (or generation) to allow you to estimate their age. Ask him/her if he/she remembers a particular event if he/she was a child when it occurred.

For individuals who show you an identification card (birth certificate, identification card, passport, driver's license, consular card, etc.), write the date of birth shown on the document under the coding table.

Otherwise, ask the question: "What is your date of birth"?

Write the answer given by the surveyed person, indicating the exact date of birth.

18. Date of birth

Now you are able to record the household members and visitors on the questionnaire, and complete the answers to questions 14-18 and 19-20 for each person.

Question 18: Date of birth or age
The age of an individual is the number of years since birth. It is obtained accurately by difference of date: date of observation (day, month, year) - date of birth (day, month, year). The age of an individual is a very important variable in the sociodemographic and economic analysis of the census data.
Therefore, you must make every effort to obtain this vital information with as much accuracy as possible. Ideally, the birth date of an individual should be expressed in day/month/year format. Try to get maximum accuracy (day, month, year) whenever possible. Check the civil status documents of respondents who have them.
In order to record the response obtained, a distinction must be made among several possible scenarios:
1 - The date of birth information is complete (day, month, year).

2 - The date information is not complete: We know either the month and year of birth, or the year of birth only.

3 - Date of birth information is not available, despite your best efforts; in this case, you must ask the following question: "What is your age?" Always test the plausibility of the answer provided, using simple cues such as: identification of people of the same generation whose age is relatively well known, important historical facts, etc. The answer obtained is transcribed as follows for an age of 42: 42 (age)
Note: For any person born before 1901, even if the date of birth is known, you should not record such a date of birth in the corresponding coding grid on the questionnaire. Instead, in these cases, simply write "97" in the coding grid under the "age" category.

Record in the boxes the day, month and year of the person's birth. For example, if that person was born in 19 of February of 1975. [See the example in the picture next to it].

28. When was [the respondent] born?

4. What is the month and year of birth for [the respondent]?

Step 10: Section 4, information about the Population / B: General Characteristics, is divided into three parts: The first part corresponds to the questions that go from question one to ten.

[A copy of part of section 4B of the census questionnaire is omitted here.]

Tips:

• Follow the sequential order of the questions.

• Pay attention to the instructions that are indicated in questions 3 and 9.
• In question 7, do not include the insurance of the IESS.

• The disabilities are of permanent nature and that prevent him/her from doing activities that other people would do without difficulty. If any person mentions that his/her hip hurts, that he/she has to use glasses because he/she no longer sees well, or that he/she must use an apparatus to hear because he/she no longer hears well, these will not be registered as disabilities.
• If a person does not speak (mute person), register alternative 4 and note it in observations.

1. All persons

4. What is your date of birth?

8. Date of birth

4. Date of birth

4. Date of birth

D4. Date of birth
If date unknown estimate year
Day ____
Month ____
Year____

D4. What is [person's] date of birth?

[D4a] What is this person's date of birth? If date unknown, estimate year.

5. Date and Place of Birth

2) Date and location of birth
Born on _ _ (day) _ _ (month) _ _ _ _ (year)
At ____ Municipality (district for Paris, Lyon, Marseille)

If you were born abroad, in what year did you arrive in France?

1. Date of birth

6. Year of birth: Fill in the last three digits of the year of birth. For persons born in 1979, 1980, or 1981, also fill in the month of birth (e.g., for October, fill in "10"; for December, fill in "12")

3. Date of birth.

All members of the household
[Questions P00 through P12 were asked of all members of the household.]

P04. Date of birth

3. What is your date of birth?

6. Month and year of birth known?

7. Month and year of birth

VI-A: All ages
[Questions 1-13.]

3. Day, month and year of birth

504. Date of birth

Block V is asked to all household members
In order to fill in this block, the enumerator should try to directly interview the respondent.

Question 504: Date, month and year of birth
Ask the date, month, and year of birth of the respondent and fill into the provided boxes. If the respondent only knows the year and month of birth, write it into the provided places and put a dash on the provided line, leaving the answer box empty for date. If the respondent only knows the year of birth, the other two are crossed out and their answer boxes are empty. If the respondent does not know the year of birth, it has to be written based on the year written in P304.

[p.47]

If the respondent knows the date, month and year of birth based on the Islam, Java or Sundanese calendars, write the information completely in the empty part of Block V. Use the Age Conversion Guide (Book 4) to change the information on the date, month and year to the Roman calendar.

7. Age at last birthday _ _

13. What is your birth date (Hebrew or Latin)?

2. Instructions for answering questions :

c. Age
Age is one of the population's features and allows us to understand the population's characteristics in many fields, such as: education, employment, income, family composition and size, etc.
Information on the population's age structure is an important element in planning local-level services for the residents, such as: schools, kindergartens, youth clubs and community centers, health services, retirement homes and many other services.
Question 3.40-3.60 - What is your date of birth? Day, month and year
- Sometimes the full date of birth is unknown. In these cases, empty values will appear in the ID card instead of the day and month. For example, 00/00/1946. In this case you must type 'unknown' (Ctrl+K) in the day of birth and month of birth questions.
- If the date of birth is unknown, you will be directed to the question about age.

Question 3.60.4 - How old are you?
- Type 0 for a baby whose age is less than a year.
- You must type whole years, rounded downwards. For example, if a person is aged 24 and a half, type 24.
- If the exact age is unknown, ask about the person's approximate age. If the interviewee does not know whether a person is 42 or 43, choose one of his answers.

5.39 Question 3.3 Age
Record the Month, Day and Year of Birth of the Individual in the relevant boxes at Q3.3a. Based on this information, calculate the age at last birthday and record in the space provided at Q3.3b. Use Appendix I as a guide. There must be an entry at age for each individual. It is possible that some persons may not remember the exact date of birth but can tell you the age". Others may only know the year of birth and so on. You must however make every effort to obtain an estimate. For persons 100 years and over, record "99".

1.2

5. Date of birth

75. Column 5: Date of birth

P4. In what month and year was [the respondent] born? _ _ / _ _

C5. What is your date of birth?

7. Age

6. and 7. Column P6 and P7: Date of birth and age

The census enumerator should devote to this part a special care, since these questions are by themselves of utmost importance, since the age variable will play a major role in the analysis of the data collected.

6. Column P6: Date of birth

The date of birth in written in Column P6 for the household members who have an official document certifying their date of birth. This date of birth will be converted into integer number of years in Column P7, as explained in the example below. For the under-five children, one shall insist to obtain the proper date of birth.

Principles for determining age from the correspondence tables:

Determining the age shall be done, whenever possible, from a birth certificate. If this is true that in urban areas most children will have a birth certificate, this is however not the case in rural areas. Indeed, the high rate of illiteracy is a major handicap for the functioning of vital registration in rural areas. Therefore, in these areas, the age is expressed as the number of rainy seasons seen by the person.

Furthermore, one should note that in rural areas, references are made to the lunar calendar, translated into vernacular languages.

This is why a correspondence table was established, in order to allow the precise determination of the date of birth for children less than 10 years of age, according to the Gregorian calendar. This technique is based on the knowledge by the respondent of three elements:

Instruction: If the person was born before 1909 (100 years or more), the agent records "99" in the "Month" box and "0000" in the "Year" box.

If the person does not know the month or the year, the agent records "99" in the "Month" box and "9999" in the "Year" box.

3. Date of birth:

Q6a. Date of birth

Q6b. Age in years

Date of birth or age. Show clearly date of birth or age according to declaration.

Q6a. Date of birth____

7. Date of birth or age

Q07A: Date of birth / year of birth

4. What is your date of birth?

Parts A and B - Urban and RNVs - Questions 1 to 5
Your job as an interviewer to find out and write down on the census form the names of

You write down the names of these people in the answer boxes for Ql.

Question 4

In this question you must use probing and the notable events book to work out people's ages.

Quite often parents have health record cards for young children. So always ask if the health record cards are available.

Always try to obtain the day, month and year of birth. If this is not available then try your best to get the month and year. Sometimes you will be able to get an estimate of the month and in these cases you must give the estimate of the month.

Age conversion chart
The back page of this manual has an age conversion table. Always use this table. That is you must always enter both the age in years and the year of birth in the boxes in question 4. When the month is known or you can estimate it then enter month as well. When day of birth is known then enter this also.

How to use the notable events book
The procedure for using the Notable Events Book is given in the front of the Notable Events Book. You will be shown how to use this book during training.
For easy reference copy the notable events for the District or area you are working in onto the inside of the back of this manual.

[pg.53]

Don't suggest ages to people
There is a strong temptation to suggest ages to people, particularly to someone who is taking a long time to work out their age or to someone who has got no idea of their age. Don't do this. Use the Notable Events Book.

Check ages with rest of family structure
You can do a rough check to see if someone's age looks about right by checking it against the family structure and the ages of other people in the family.

Questions 1 to 5

Question 4

The PDS Man will do most of the work on ages. He will work out the age of each person on the Family Record Card
Interviewers copy down the Date of Birth and the Age in Years onto the Census Form.
If a Household has some visitors, the Interviewer must work out their ages because visitors will not be written on the Family Record Card.
Where possible, Health Cards or Clinic Cards should be used to find out the exact date of birth of children. Most mother will have these cards.

Working out ages
The PDS Man is to convert 'Year of Birth' to 'Age in Years', by using the 'Age Conversion Table' on the back of this Manual.
The PDS Man must check these ages. Look to see if the person appears to be the age that is written down.
Also look for 'Impossible Ages' i.e. when a woman has a child that is almost as old as she is.
If you think that the age written on the Family Record Card is wrong you must change it. You must work out how old that person really is.
The way to work out how old that person's age is by using the Notable Events Book.
Whenever possible you should write down the month of birth as well as the year. This is especially important for young people under 10 years old. If the mother does not know the month, you can guess by asking if the child was born before or after the Independence Month (September).
Interviewers must ask visitors if they know how old they are. If they are not sure of their age you must work it out by using the Notable Events Book.

Writing ages onto the census form
You must fill in the date of birth and the age in years. You should write down the Month as well as year of birth if at all possible.

4. Date of birth or age

4. What is the person's date of birth or age in years?

Question 4: Date of birth or Age
Every community has people of different ages, ranging from very young to very old.
Peoples' needs change according to their age. Policy makers and planners need to know the number of people of each age group in every community, so they can plan for enough schools, aid posts and other community needs. Here are examples of how information on age is used.

When answering the question, make sure that the age of every person is recorded.

Q4. What is the person's date of birth or age in years?
(Write date of birth in the Boxes provided day / month / year. If not known write age in completed years)
_ _ _ _ _ _
Age in years: _ _

Who to ask: Ask for all persons in the Household.

Get this information for: Every person listed in Question 1.

7. Year of birth _ _ _ _

4. For each person, print this person's age and month, day, and year of birth. Print the age at the last birthday. Do not round the age up if this person is close to having a birthday. If the exact age is not known, provide an estimate. Print "0" for babies less than 1 year old.

4. What is Person X's age and what is Person X's date of birth?

Answer questions 1-6 for the first five people living or staying at this address.

• Include everyone who is living or staying here for more than 2 months.
• Include yourself if you are living here for more than 2 months.
• Include anyone else staying here who does not have another place to stay, even if they are here for 2 months or less.
• Do not include anyone who is living somewhere else for more than 2 months, such as a college student living away or someone in the Armed Forces on deployment.

P4. For each person, print this person's age and month, day, and year of birth.

57. For each person the enumerator will record the exact date of birth: the year, the month, the day, written in Arabic figures -using, in all the cases two Arabic figures. So, for the months and days to the numbers between 1 to the 9, in front of each figure "0" will be written first (01,02, . . . . 09). For the year all 4 numbers will be written.

For the persons who do not remember the exact year, month and the day of birth, the enumerator will ask for identification card or the birth certificate. When none of these documents are available (for aged persons), additional questions will be asked aiming to track the birth date, or at least the year of birth (as temporal reference point as: historical and social events and the relation to the age of the person at the moment of event).

4. Date of birth

P6. Date of birth ____

P05. _ _ / _ _ _ _ Date of birth

[Questions 1-6 were asked of all members of the household.]

4. In what month and year was the respondent born?

Note: Make sure always that your writing is legible and within the appropriate box.

Total Population

B5. Date of birth

The entire population
[Questions B01 through B10 were asked of all persons.]

B07. Date of birth

B07: date of birth
The date of birth that allows knowing the age of the individual is a very important piece of information from the census. So, you have to do everything you can to get the exact information. Before asking the question about the date of birth of the members and visitors of the household, ask to consult all the birth certificates (or other documents that can inform about the date of birth) if possible, to avoid repeated unnecessary searches that the respondents may be led to do. However, you must make sure that the items that have been presented to you are reliable. If not, make the estimates necessary to determine the date of birth of the person concerned.
Two cases may arise:
1st case: for persons who have a civil registry or identity document with a full date of birth, ask whether this date is a result of a declaration of birth or a judgment.
[p. 34]
- If it is a declaration of birth: Enter the rank of the month in the boxes under which is marked ''month'' and the year in the boxes under which is marked ''year''.
Example: An individual was born on February 3, 1948. Fill in the column as follows:
/_0_/_2_/
Month
/_1_/_9_/_4_/_8_/
Year
NB:
1. If the month and year of birth are known, go to B09:
2. If the month is not known and the year is known, enter 07 (month of July) for the month.
3. If the month and year of birth are not known, fill in the column as follows:
/_9_/_9_/
Month
/_9_/_9_/_9/_9_/
Year
2nd case: The individual does not have any civil registry document: Then make a rigorous estimate using the historical calendar and other means of estimation to have at least the year of birth.
And then you move on to the next question.
NB: For children under the age of 5, accept birth certificates and possibly child health records.

[3.7] Household members

[3.7.1] Demographics

[3.7.1.3] What is the respondent's date of birth? ____

Basic variable for determining the structure of the population and the generational studies about fecundity, mortality, or future evolution of the population.

L4. Month and year of birth

Column 4 Month and year of birth

Question "May I have your month and year of birth?" record month and year of birth in Column Month and Year, respectively.

Remarks: If the interviewee does not remember month and date of birth of family members, ask for the household registration to verify.

S5. What's [respondent's] month and year of birth?

Column S5: Month and year of birth
Ask: "...... (name) ...... , in what month and year were you born?"
Record the month of birth and year of birth in the columns of month and year, respectively.

(P06) Date of birth _ _ _ _ _ _

Column P06: Date of birth or age

Column P06 is intended to record either the date of birth (by preference), or the age (if the date of birth is not known). This column must be completed for all the members of the household. Identity or civil status documents or failing that birth certificates for the newly born will be of great use.

[p. 24]

To do this, you should proceed as follows:

First, seek to record the date of birth:

Pose the following question: "What day, in what month and in what year was [the respondent] born?"

Record the date of birth declared by day, month, and year in the corresponding boxes.

If the person surveyed declares having been born in 1960 for example, record the year declared in the boxes reserved for the year and put dashes in the boxes reserve for the day and the month.

The figures corresponding to the month are:

Examples:

1. For a person born on October 04, 1990, record in the boxes:
Date: /_0_4/ /_1_0/ /_1_9_9_0/ and put dashes in the boxes reserved for age.

2. For a person born in April 1960, fill in the column as follows:
Date: _ _ /_0_4/ /_1_9_6_0/ and put dashes in the boxes reserved for age.

3. For a person born in 1960, fill in the column as follows:
Date: _ _ _ _ /_1_9_6_0/ and put dashes in the boxes reserved for age.

NB 15: For a respondent who declares for example that they were "born around 1940", ask them their age. If they know their age, record it in the corresponding boxes. If they do not know their age, put dashes in the boxes reserved for day and month and record the year declared in the box reserved for the year (just as in example 3).

4. Date of birth and age

(a) What is (N's) [the respondent's] date of birth?

(b) What was (N's) [the respondent's] age at last birthday?

P4 Date of birth What is (name's) exact date of birth? (Write the Day, Month, and Year) _ _ /_ _ /_ _

Question P4 and P5: Age and date of birth
90. Record the person's exact date of birth as follows:

For all persons

P5 What is [the respondent's] exact date of birth? (Write the day, month, and year) _ _/_ _/_ _ _ _

The answer on the day, month and year of birth is written down in figures in specially outlined frameworks.

[An example is omitted.]

[p.19]

It is not allowed to approximate or round the day, month and year of birth (e.g., for those who were born on the 9th or 11th you couldn't write the 10th; for those who were born in 1939 you couldn't write they were born in 1940, etc.). If the person enumerated indicated the year of birth ending with 0 or 5, you should make sure that he indicated the year correctly without rounding.

After the recording of the date of birth and without additional asking the respondent an enumerator determines and writes down the number of years that have passed in a specially outlined framework using the Supplemented table for indication the years for persons whose year of birth is known as of 5th of December 2001 (Appendix 1). For children less than 1 year 0 is written down.

Please report babies as age 0 when the child is less than 1 year old.

Age (in years) : ____ Month: _____ Day: ____ Year of birth: _______

4. What is Person X's age and what is Person X's date of birth? Please report babies as age 0 when the child is less than 1 year old.

4. For each person, print this person's age and month, day, and year of birth. Print the age at the last birthday. Do not round the age up if this person is close to having a birthday. If the exact age is not known, provide an estimate. Print "0" for babies less than 1 year old.

4. What is Person X's age and what is Person X's date of birth?

Answer questions 1-6 for the first five people living or staying at this address.

• Include everyone who is living or staying here for more than 2 months.
• Include yourself if you are living here for more than 2 months.
• Include anyone else staying here who does not have another place to stay, even if they are here for 2 months or less.
• Do not include anyone who is living somewhere else for more than 2 months, such as a college student living away or someone in the Armed Forces on deployment.

P4. For each person, print this person's age and month, day, and year of birth.

For everyone:

2. What is his/her birth date? (PerNa02)

This question verifies the age of each one of the members of the household, since depending on the age, the system enables (or not) certain determined modules or questions of the questionnaire. If a person resists giving his/her age or date of birth, remind them that the census information is confidential and is assured by the Law.

4. In what solar month and year was [the respondent] born?

Question 4: In what solar calendar month and year was [the respondent] born?
Month and year of birth are recorded in the solar calendar; they are the actual month and year of birth in the solar calendar and are not following any kind of document (identification card, population registration book, etc.).

If the respondent knows the month and year of birth in the solar calendar, then the enumerator records that month and year on the printed boxes. If he/she only remembers the month and year of birth in the lunar calendar, then the enumerator must use the "Conversion between lunar and solar calendar years" (Appendix 7) to convert the lunar calendar month and year to the solar calendar month and year.

Note: The solar calendar year often comes more than 1 month before the lunar calendar year; when converting month of birth in the lunar calendar to the solar calendar, the enumerator should add 1 to the month of birth in the lunar calendar. Thus, persons born from month 1 (thang gieng) to month 11 (thang mot) in the lunar calendar month will become the months of February to December of the same year. If they were born in month 12 (thang chap) in the lunar calendar, their month of birth in the solar calendar will be January of the next year.

If the respondent does not remember the month of birth, the enumerator must use a prompt: In what season was [the respondent] born? Born before or after the lunar calendar Tet, mid-lunar calendar month 7, mid-month 8, born before or after the date of the victory of Dien Bien Phu battle (7 May in the solar calendar), liberation of the South (30 April in the solar calendar), National Day 2 September, Uncle Ho's birthday (19 May in solar calendar), etc. to help the respondent remember the month of birth.

As the Census day is 1 April, those who have the same year of birth and month of birth from January to March will have the same way of calculating completed age, and those who have the same year of birth and month of birth from April to December will have the same way of calculating completed age. Therefore, in case the prompt was used but not successful, try to ask whether the respondent was born in the first three months or in the last nine months of the solar calendar year to select randomly one of the first three months, or of the last nine months to put into the corresponding two boxes.

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If after taking such an effort, the respondent is still unable to remember the month of birth, enumerator will put "98" into the corresponding two boxes and continue to ask about the year of birth.

If the respondent remembers the birth year in the lunar calendar, the enumerator will record that year into four printed boxes. For example, if the birth year is 1954, record "1954" into four boxes, 1 digit per 1 box.

If the respondent does not remember the birth year in the solar calendar, but remembers the birth year in the lunar calendar (for example Binh Ty, At Suu, etc., or even only remembering the animal age: Tiger, Cat, etc.), use the "Conversion between lunar calendar and solar calendar years" (Appendix 7) to choose a corresponding solar calendar year to fill in the corresponding four boxes, then move to ask Question 6, not Question 5.

Note, in using the "Conversion between lunar calendar and solar calendar years" to choose a solar calendar year for the respondent, there would be a difference of 12 years (if the respondent can only remember the age in the animal year: "chi") or 60 years (if the respondent can remember both "can" and "chi"), so it is necessary to ask an additional question "By this year, how old was [the respondent]?" in combination with looking at the face of the respondent to determine the true age to avoid confusion.

In case the respondent is unable to remember the year of birth, the enumerator marks (x) in the small box next to the code number "9999", then asks about Question 5 and leaves the boxes used to record the year of birth in the solar calendar blank.

4. In what solar calendar month and year was [the respondent] born?

Part 1: Information about members of the household
Part 1 of the Census form consists of 41 questions, numbered sequentially from Question 1 to Question 41.

The respondent is the head of the household or a person knowledgeable about members of the household. For information on employment and birth history of women, DTV needs to interview DTDT face-to-face and collect information. In addition, for other information about members of the household, if the head of the household or the information provider is not knowledgeable, DTV also needs to interview DTDT face-to-face and record the information.

Question 4: [the respondent] was born in which month and year according to the solar calendar?
The month and year of birth are recorded according to the solar calendar and are the actual month and year of birth. DTV does not rely on any kind of document (ID card, household registration book, etc.) to record the month and year of birth unless DTDT confirms that the month and year of birth or that of members of the household is the same as that on the document provided by the household. DTV tries to obtain the month and year of birth to have sufficient information for other contents of the form, especially for children under 5 years old.

Some notes when identifying the month and year of birth according to the solar calendar:

Since the time of the census is April 1, 2019, people born between January and March of the same year will have the same way of rounding their age; People born between April and December in the same year will have the same way of rounding their age. Therefore, in case DTDT still cannot remember their month of birth after the probing questions, DTV tries to find out whether DTDT was born in the first 3 months or the last 9 months of the solar year to randomly choose 1 month in the first 3 months or the last 9 months of the year to write in the corresponding box.

After more probing questions but DTDT still cannot remember their month of birth, DTV writes code "98" (for electronic form, select code "KXD"). Then proceed to ask DTDT the year of birth according to the solar calendar.

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In case DTDT does not remember the year of birth, DTV writes code "9998" (for electronic form, select code "KXD" or enters code "9998").