Dear [Principal's Name],

I am writing to inform you that I was absent from school on 05/05/2023 due to attending a family marriage ceremony. I apologize for any inconvenience this may have caused.

I understand the importance of attending classes regularly and will make up for the missed lessons. I will also ensure that all assignments and homework are completed on time.

Thank you for your understanding.

Sincerely,

[Your Name]