28 days.
The moon's cycle is 29 days old.29 days(or to be precise 29.3)
The moon completes one full cycle, from new moon to new moon, in about 29.5 days. This is known as a synodic month.
Define "cycle". 29.5 days is the most common answer.
A full Moon cycle - for example, from one new moon to the next - is about 29 1/2 days.
29.53 days
29.53 days
29.53 days (rounded)
29.53 days
29.53 days
28 Days
It takes about 29.5 days for the moon to complete one full phase cycle, from new moon to full moon and back to new moon again.
29.5 days.