You forgot your friend’s birthday. What do you say when you see them?
Example: Hi Julie! I’m so sorry I forgot your birthday. I wrote it on my calendar but my dog ate it. I knew it was sometime last week. Anyway, I would like to make it up to you and take you out for dinner. Anyplace you want to eat for 30baht. How about tonight? Are you free and we can celebrate your belated birthday?