note 7869 deleted from mktime by ronabop

Here's a neet problem I'm running into. I have the DAY NUMBER going into a database (0-365) and this year going into another field in the table. If I'm making a weekly report that I want to display for 7 days (starting Sunday through Saturday), and the person keeps clicking the Previous Week link I made that goes backwards one week, how do I make the days go back properly where it's January 1, 2000 going back to December 26, 1999? I've gotten it to a point where I can actually go back without it crashing my browser now, but I miss the January 1, 2000 day in the report. TIA, Armando (I still hate temporal mechanics)