Equal Month Calendar. If the month is fixed on the time that the moon circles the earth, then the time of the circling isn't equal each month? An extra day added as a holiday at the end of the year (after december 28, i.e.
The calendar year has 13 months with 28 days each, divided into exactly 4 weeks (13 × 28 = 364). A month is nothing but just a bad habit.’ the international fixed calendar is a solar calendar with 13 months of 28 days each.