In common years, an intercalary day, December W, is added after December 30. This would be a world holiday or sabbath. In leap years, another intercalary day, June W, is added. It is also considered a world day or sabbath. The names of the days and months are the same as in the Gregorian calendar.
This modern calendar is divided into four equal quarters of ninety-one days and thirteen weeks. In each quarter, one month has thirty-one days and two months have thirty days each. Each year begins with a Sunday and ends with a Saturday.