28 days -- the time it takes the Moon to orbit the Earth once
(LU·nar MONTH). A "lunar month" refers to the period of a complete revolution of the moon with reference to some fixed point.
the period between successive new moons (29.531 days)
a period of time from a new moon to the next new moon
the period of one complete revolution of the moon around Earth, 29.5 days
The average time between successive new or full moons. A lunar month is equal to 29 days 12 hours 44 minutes. Also called a synodic month.
A lunar month (or synodic month) lasts 29 days, 12 hours and is the time between two successive full moon.
A lunar month (also called a synodic month) is the time between successive new or full moons. It lasts 29 days, 12 hours, and 44 minutes.
In lunar calendars, a lunar month is the time between two successive similar syzygies (new moons or full moons). There are many variations. In Middle-Eastern and European traditions, the month starts when the young crescent moon becomes first visible at evening after conjunction with the Sun 1 or 2 days before that evening (e.g. in the Islamic calendar).
