To clarify some stuff. Any of the R lots (WR, ER) are enforced 24/7. Any of the E or W lots are only M-F 8-5. Most of the meters are 24/7 although there are some around campus that are only M-F 8-5. If you never register your license plate with them to get a parking permit than you'll never hear about the ticket again. I used to keep my old car on campus for most of my freshmen year illegally bouncing back and forth between the student center lot and parking meters (now they lock the student center deck at night so you cant just wait for the attendant to leave and then leave the lot).

I dont know what lot you were in exactly since I've never lived or parked on East Campus.