Codes and Frequencies
BIRTHYEAR_AF (V010) reports the woman's year of birth according to the Solar Hijri calendar, which is used in Afghanistan and Iran.
BIRTHYEAR_AF (V010) has no comparability problems.
All standard date variables in Afghanistan DHS samples are given in the Solar Hijri calendar. The Solar Hijri calendar year consists of 12 months of 29 to 31 days. The first 6 months (Hamal through Sonbola) each contain 31 days, the following 5 months (Mizan through Dalvae) each contain 30 days, and the last month (Hut) contains 29 days (30 in a leap year). The Solar Hijri calendar begins on the March equinox, which usually falls around March 21 in the Gregorian calendar. In general, the Solar Hijri calendar is 621 or 622 years behind the Gregorian calendar.
Comparability - Standard DHS
BIRTHYEAR_AF (V010) is included in every phase of the standard DHS questionnaire for Afghanistan.
- Afghanistan 2015: Ever-married women age 15-49.