Write an application to your Headmaster of your school for advance leave mentioning the beginning and ending date of your leave.
January 27, 2022
Shajuddin Sarker Model School
Subject: An application for leave in advance
I beg most respectfully to state that the marriage ceremony of my elder sister comes off on Monday next, the 20th July. So, I shall not be able to attend the school from the 28tth to the 30th instant
May I , therefore, pray and hope that you would be so kind as to grant me leave for those days only.
Your most obedient pupil,