Twenty-eight days. As the moon orbits the Earth - it rotates once on its axis.
365 and a quarter days. The calendar normally has 365 days, and every leap year (366 days) makes up for what we missed, which is a total of a day, hence the "extra" day in February.
29 1/2 days.
27.32 earth days
The lunar day is about 29 earth-days long.
A day on the moon, known as a lunar day, lasts about 29.5 Earth days. This is because it takes that long for the moon to complete one full rotation on its axis.
708.74 hours (29.531 Earth-days)
Apollo stayed on the moon for one probably really fun day
A "Moon year" is almost exactly the same as an Earth year. That's about 365 Earth days. The Earth and Moon orbit the Sun in about 365.25 Earth days. So the answer is: about 365. If you mean how many "Moon days" in one Moon year, that's different. The Moon rotates in about 27.3 Earth days. That's one definition of a "Moon day". In that case the answer is about 365/27.3 days = about 13.37 days.
The length of a "day" on the moon is 29 Earth days.
A day on the moon is 29.5 Earth days. The moon takes 27.3 days to fully orbit the Earth. This is called a sidereal day.
Moon's rotation on its axis, and revolution in its orbitaround the earth, are both 27.32 days.
One day on the moon is equal to approximately 29.5 Earth days. This is because it takes the moon about 29.5 days to complete one full rotation on its axis, which is the same amount of time it takes to complete one orbit around the Earth.