You need 5 days' leave in advance. Now, write an email to your headmaster asking for 5 days' leave in advance.

 

 From       : shiponislam@gmail.com
To              : headmasternpk@gmail.com
Subject    : Regarding 5 days' leave in advance.

Dear Sir,
With due respect and humble submission, I would like to inform you that my elder brother's marriage ceremony is going to be held on 14 January 2025. So, I have to perform various activities on that day.

I, therefore, request that you grant me 5 days' leave in advance with effect from 12 January 2025.

Obediently yours
Shipon Islam
Class-IX, Roll No. 03