what is date for apply for entrance exam

Hello aspirant

As you have not mentioned the name of the entrance exam I am assuming it an IISER aptitude test as you tagged it, also with that ill provide some other entrance exam dates too.

The IISER application process 2021 will start at different dates for the three channels of admission- SCB, KVPY, and JEE Advanced. That is for the SCB channel it is expected to start from the fourth week of March 2021, for the KVPY channel it is expected to start from the first week of April 2021, for the JEE Advanced channel they didn't notify yet.

JEE entrance exam application form is issued on 16th December 2020
The last date for submission is 16th January 2021

AIEEE entrance exam application form is issued on 16th December 2020
The last date for submission is 16th January 2021

You can refer to the below links for more information.

https://www.google.com/amp/s/engineering.careers360.com/articles/iiser-application-form

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-application-form

https://www.google.com/amp/s/engineering.careers360.com/articles/aeee-application-form

Hope this answer helps you.

Good luck!!