I've recently been watching the show Superstore. As I started watching and making it through season 1, they have a specific date they mention, that they say "we don't talk about that date"
That date is March 14th (My Birthday). Later through the series sometime in season 2, they mention another date of June 17th (My Brothers Birthday). I don't remember the significance of this date in the show, but then later on in season 3 or 4..., one of the characters (Amy) has a baby and names the baby Parker.