1438: The New 40?

The observed birthday of the Islamic Prophet Mohammed fell on Tuesday the 18th. They had a live broadcast of services from a major Istanbul mosque (Fatih Camii or "Conqueror's mosque") on a few TV channels to celebrate. That makes it a banner series of days starting with last Friday with Pi Day, the Ides of March, Palm Sunday, St. Patrick's Day, Canakkale Victory Day, Mohammed's Birthday, the first day of Spring, and Good Friday today and Easter Sunday.