Are birthdays pagan worship

No. Birthdays aren't religious celebrations, they're cultural ones.

EDIT:

one person can say yes, and another person can say no. it all depends on how you look at it. in The Bible there were only two mentions of birthdays. the birthdays were celebrated by people who were pagan. so if you are looking at it from that point of view, yes it is pagan. like the person who answered above, you may believe that it is cultural. so the answer can go both ways.

Doesn't a persons lifestyle or cultural traditions they celebrate affect his/her religion and spirituality?