Override View Criteria

I have a view sorted by a date field. Normally I want to show records from the last week and all records in the future. The criteria is Input_Date > (zoho.currentdate - '1W:1D:0H:0M:0S')

Once is a while a user needs to see records that are older than one week. Is there a way to start the view at a specific date but allow teh user to reset the date?

Herb Wexler