Subject: Apology for Missing Your Birthday Party

Dear [Friend’s Name],

I hope this email finds you well. I am writing to apologize for not being able to attend your birthday party. I know how much you were looking forward to it and I feel terrible that I couldn't make it. I hope you had a wonderful celebration and please accept my belated birthday wishes.

The reason for my absence was that I am currently on holiday with my family. We planned this trip months ago, and unfortunately, it coincided with your birthday party. I was really looking forward to celebrating with you, but due to circumstances beyond my control, I couldn't make it.

Let me take this opportunity to tell you about my holiday. We are currently in [destination] and it has been an amazing experience so far. We have been exploring the local attractions, trying out the local cuisine and enjoying the beautiful scenery. The weather has been fantastic and we are all having a great time.

I understand how important it is to celebrate birthdays with friends, and I am sorry that I missed yours. However, I promise to make it up to you when I come back. We can plan something special and catch up on all the things that we have missed.

Once again, I apologize for not being there on your special day. I hope you can forgive me and we can continue to cherish our friendship.

Best regards,

[Your Name]