Is it possible to change the date of deposit?

Yes, you can change the date of a deposit along with the other information from the Deposits screen > detail view. Go to Accounting > Deposits and select the deposit you want to edit from the list view; then, click View Details. On the General tab, you can change the deposit date or any other details as needed. Click Save & Done when you have finished. Check CORE Help Center for details on Deposits.