From Mommysavers Website:
Target holiday markdowns usually follow a 3-3-2 schedule (this came from our discussion forum). Clearance merchandise goes to 50% off the day after the holiday, then 3 days later 75%. Bagged candy starts at 30% then goes to 50% and 75%. Again, 3 days after that whats left is 90% off. 2 days after that it goes to salvage (Goodwill). If that holds true for Easter 2011, April 25th = 50% off, April 28th = 75% off, and May 1st = 90% off.