Write an e-mail to the Principal of your school requesting him/her to grant you an extension in your leave because you are held up at a place you and your family had gone to for vacation.
Here is a sample mail for our reference:
Date: 05thMay,2003
From: girish.sethi@tmail.com
Subject: Requesting for extension in holiday
Respected Sir
I am writing this mail to request you for the extension in my holidays. I am on leave since 2 May,2022 as I am out if station for 5 days with my family. But due to bad weather in the area, we are unable to come. I request you to extend my holiday for one morr week. I shall be vey thankful to you fir this.
Your's obediently
Girish.