KT4. Check Q4 or Q5: from 15 to 39 years old (born since April 1979 to March 2004) then go to Q21; otherwise go to Q23.

21. In what solar calendar month and year did [the respondent] get married the first time?

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.

Test 4 (KT4)
The test question is intended to identify people aged from 15 to 39 (born from April 1979 to March 2004) to proceed to Question 21; for people aged 40 and over, DTV asks Question 23.

In case the month of birth cannot be identified (the month of birth in Question 4 is recorded as "98"), DTV proceeds to Question 21 for people born between 1980 and 2004.

Question 21: [the respondent] got married for the first time in which solar month and year?
The question is intended to collect information about the solar month and year when people aged 15 to 39 got married for the first time.

The first marriage is the first marriage of DTDT that is recognized by local laws, customs, and practices; or living together with someone of the opposite sex for the first time as a spouse.

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The way to ask and write Question 21 is the same as that for Question 4 "The month and year of birth according to the solar calendar" (see instructions on how to ask and record for Question 4). Please note, the question is only intended for people aged 15 - 39, so DTDT tends to remember the month and year of their first marriage.