You have not stated about your sect or sampradya
Any how logically it is wrong.
The samaradhan can be postponed to some other day if it is not possible to done on the next day
but it is not advisable to done on the same day on shradha day.

Dear you, Thanks for Visiting Brahmins Net!
JaiHind! Feel free to post whatever you think useful, legal or humer! Click here to Invite Friends