Ethiopia has several local calendars. The most widely known is the Ethiopian calendar, also known as the Ge'ez calendar, and written with the ancient Ge'ez script, one of the oldest alphabets still in use in the world. It is based on the older Alexandrian or Coptic calendar, which in turn derives from the Egyptian calendar. Like the Coptic calendar, the Ethiopian calendar has twelve months of exactly 30 days each plus five or six epagomenal days, which comprise a thirteenth month. The Ethiopian months begin on the same days as those of the Coptic calendar, but their names are in Ge'ez.