No, it's not stupid. It may be stupid to you, but for AJ and her fans, that is one of the most special days in our lives. I got the same thing on my hand, because it means a lot to me as a fan. Personally, I think it looks really cool written out in tally marks. A tattoo, a permanent marking, needs to both look cool and have an important meaning. This tattoo, for AJ, and for me, accomplishes BOTH.
I think it's more important to AJ than her fans. I'm a huge Christian fan, and I can't remember the exact date he won the World Heavyweight Championship. What you're doing right now, is just plain creepy, lol. Keep loving AJ though.