There is a tradition here in some areas of Iran called 'The First Eid', held by a recently died person's family as a reminder at the first Eid (Islamic happy occasion) after his/her departure. The event represents the family's grief at an Eid when they were expected to be happy.
How sad if we were to hold a 'First Eid' for the recently martyred Hazrat Fatimah Al-Zahra (AS), since her First Eid would be her own birthday anniversary!