AGEMN (MV012) reports the man's age. DHS surveys collect information about the man's age through questions about age at last birthday and date of birth. DHS Recode Manuals provide the following information about how the AGE variable is calculated:
Current age in completed years is calculated from the century month code of the date of birth of the respondent (MV011) and the century month code of the date of interview (MV008). In a few cases the age in the data file will be different from that reported by the respondent when the respondent's birthday was in the month of interview, but he had not yet had his birthday. If the respondent correctly reported his age at his last birthday (and not his age at his next birthday) then the calculated age was rounded up from the reported age, to avoid inconsistencies between the age and the century month code for the birth.