Hello Aspirant

A minute mistake such as the date will not create any huge impact on your OMR sheet, also your sheets are not directly passed through OMR checker.

Before passing the OMR sheet through the OMR checker, teachers or some people on duty check the OMR sheets for errors like Roll number mistake and such stuff, then arrange the sheets in correct order.

So you do not need to be afraid if you have filled wrong date in the OMR sheet, your answer sheet won't be rejected.

Hope this helps.

All the best!