Does anyone remember the birth date on the tombstone (her own) that Lois saw in the alt universe? I remember the year as being 1967, but I can't remember if there were details of the specific date.
It doesn't have the dates, only the years 1967-1993. She does mention that she's a Libra though, in another episode. So that at least narrows down the time of the year (Sept-Oct).