On average 29.53 days
All but one. The cycle of phases of the Moon takes 29.5 days, so however you define the length of a lunar phase, you're missing one.
The complete cycle of moon phases repeats every 29.53 days.
28 days. That is how many days there are in the Islamic calendar, which is based on the phases of the moon.
27.531 days, on the average.
Lunar phases lasts about 3 1/2 days. The moon doesn't change phases fast enough to change on a nightly basis. It takes several days.
225 days
31
243 days
5 days
There are 365 days in one year.
It takes about 28-30 days.
Normal year = 365 days Leap year = 366 days