Here are some more thoughts about recording birth dates. Perhaps most of the time, you will have several "data points" that imply birth year - for example one (or probably more) census age, possibly age at marriage, even age at death. In the absence of a definite DoB (usually from birth certificate), the "real" date will likely have an uncertainty of *at least* a year. This is because census age reporting is notoriously variable, and even age at death may well not be accurate. (Incidentally, it is not unknown for claimed birth dates on a certificate to be in error - deliberately or not.) My own approach is to choose a birth year that best fits the available data and qualify it with "App(roximate)". Note that the Family Historian Property Box Event display is very handy here in highlighting which event ages are "out of bounds". Note also that I try to avoid a birth date range expression like "Between x And y" because FH cannot then do its date calculations! I don't know how widely this is understood, but apparently FH treats "1870" or "c.1870" as "1 Jan 1870" for calculation purposes. Similarly "Feb 1870" would be taken as "1 Feb 1870" and "Q3 1870" as "1 Jul 1870". The important things are to be consistent about your method of recording birth date *and* to include reported age in your source citations (so others can form their own opinion). Just a couple of extra comments. There is not *usually*, in my opinion, much point in trying to estimate birth date to better than a year (some life event ages may be inconsistent). However, with a birth registration index you may be able to narrow that down to a specific quarter (e.g. Q3 1870). In that case I would choose the birth date as "c. Aug 1870". Note that I chose *middle* month of the period on the basis that the actual *registration* date would be at most about one month in error. And in all but exceptional cases the actual birth date would not have been more than a week or two different from that. Happy Christmas, All P.S. I did not mention the other two GEDCOM date qualifiers "Calculated" and "Estimated". This is not the place to resurrect discussion about the differences from "Approximate". Suffice to say I get by perfectly well without them. except in some very special cases.