Is there any reason to politely refuse a friend's birthday party?

If you want to politely refuse a friend's birthday party, here are some possible reasons:

1. Work reason: You can tell your friends that you need to work overtime or have other work requirements to finish, so you can't attend the birthday party.

2. Family reasons: If you have a family, you can say that you need to accompany your parents, children or husband/wife, or you need to take care of your family.

3. Personal reasons: You can say that you are not feeling well recently or need a good rest, so you can't attend the birthday party.

4. Time conflict: You can say that you have other plans and can't appear at the birthday party.

No matter which reason you choose, you should be honest with each other and express your understanding and concern for your friends.