In the The Doomsday algorithm is a way of calculating the day of the week of a given date. It is perpetually accurate since the Gregorian calendar moves in cycles of 400 years. It makes use of the fact that, in each year, certain dates are all on the same day of... Doomsday algorithm, "January 32" is a code name for February 1 is the 32nd day of the year in the Gregorian Calendar. There are 333 days remaining, (334 in leap years). Events 1662 - The Chinese pirate Koxinga seizes the island of Taiwan after a nine-month siege. 1713 - The Kalabalik or Tumult in Bendery results from the Ottoman sultan... February 1, used to make computation of January dates easier.