but it was given in 23rd december 2020

Hello,

The admit card for Sainik School entrance exam will be released in the second week of January 2021 tentatively. The exact date is not yet announced. The date will be announced officially soon so you have to wait until then and keep an eye on updates regarding the important dates so that you won't miss any important information. To check the updates and related information you can use the link below

https://school.careers360.com/articles/sainik-school-admission