My cousins know my birthday month, but they never seem to remember the date (which I am very grateful for).
Some of my friends don't even know my birthday month, but know the day (not including my best friend [she knows my birthday]).
My cousins come up to me and asks, "Is you're birthday on the first?" I either shake my head or say 'no.' "The second?"
This will keep continuing until they get so close to figuring it out. "Is it on the twenty-first?" "Nope." "The twenty-third?"
In my mind I think 'What happened to the twenty-second? Did it magically disappear from your memories? How did you make through elementary school with learning all of your numbers.'
Then they accuse me of lying or they just give up. Never to learn my birthday because I won't tell them. I'll just smile and nod if they get it right or shake my head side to side.