Forms :: Setting Popup Reminder On Form Load For Expiry Date

I have a form (Access 2010) in which i insert contracts; each contract has a start and an expiry date, but instead of dd/mm/yyyy i would like the user to be able to insert just the year, while the day and month are predefined values and they are automatically inserted (i.e. 01/10/yyyy; the year being the only value that changes, and it is manually inserted by the user).

I would like to set a pop up remainder (on form load) x days before the expiry date, but, because too many of them have the same expiry date i am wondering if the reminder can be set on different days, based on another field (i.e. partner location [country]).. i.e. reminder for contracts with Austria to pop up 60 days before expiring, for UK = 67 days and so on.. or even a specific day for each, i.e. for Austria = 01/08/yyyy, for UK 01/09/yyyy).