So I went in and picked a likely birthday for me. I've always claimed I read more like someone from another era, so I picked one likely for me. Let's see, my grandfather was born in 1848... Damn, no 19th century dates available. Ah, that's it, I'm the youngest daughter of the family, born in 1907, after they'd moved out of San Francisco after the family home was destroyed in the quake... I have enough family stories I could probably do a pretty credible job of playing this character, even to people born around the same era.
Now the question is whether to leave this as my "birthdate" or decrement it every year, like Merlin living his years backwards.