I'm the worst girlfriend

Alisha • Psych student. In a long term relationship
Soooo my boyfriend and I have been together for a year now and I totally Forgot what day is birthday is! I can't remember if it is October 25th or 26th but I know it's one of those. 
​Should I ask his mom or should I just ask him??? 
​He's the type of guy that really won't care that I forgot but I want to seem like I remember everything! lol