I wish WikiTree would allow the entry of a range is dates, i.e. abt 1834-39. I have been doing research in a time period where men typically marry in their early twenties, and women in the late teens. Thus estimating the man is 20-25 and the woman 15-20 years old. Then given a marriage date for a first marriage, fairly reasonable birth dates can be estimated.
I use two different genealogy programs, both of which allow this, but alas, WikiTree does not.