[g4zj]

Before reaching the bottom of the article, I was wondering about 19xx codes, given that I've heard many people using years, or month/day pairings for garage door codes and such.

I was glad to see those plotted out. I was also initially surprised that not a single 19xx pin made the top 20, but I suppose it makes sense considering that there are 100 different combinations of this code.

[fsckboy]

I think most people who think of using a date would use MMDDYY or some equivalent format they're used to.

[GoblinSlayer]

2000 is #7, 2001 is #19. Guess what they mean. Oh wait, it was in 2012.

[PawgerZ]

Probably their child's birth year