Hey!

No, you cannot use Admit card as a proof of date of birth for updating your date of birth in Adhar card. There are many other ways to update/edit the date of birth in adhar card. You can visit the near by enrolment centre of adhar card or E-disha centre and with the help of some documents such as  SSLC Certificate, Birth Certificate, Passport, PAN Card, Government Photo ID Cards or PSU Issued Photo Identity Card that contains the date of birth can be used .

Thankyou