This procedure runs in 4 phases:
Phase 1: PAUL registration
February 17 - February 23 (timely registration)
February 24 - March 30 (late registration)
Phase 2: Tasks & Preferences
February 25 - March 23
Phase 3: Stable Marriage
March 31
Phase 4: Notification & Decision
April 2
You can find more details about the individual phases here.