21 lunar day by year
The duration of one lunar day is from one moonrise to another, and the entire lunar days in the lunar cycle - 29 or 30, depending on the speed of the moon. Since the lunar day does not coincide with sunny days, the lunar day can begin at any time - in the morning, in the afternoon, in the evening or at night. It is important to take into account the fact that the lunar day, as a rule, have different duration, sometimes can last only a few hours. The lunar cycle passes through the four main lunar phases: the new moon, the first quarter, the full moon and the last quarter. These phases of the moon since ancient times are noted in all lunar calendars. The first lunar day is counted from the moment of the new moon. The conditional division of the lunar month according to the lunar phases is given below.
