Lunar day
= Lunar day
{wiki=Lunar_day}
A lunar day is the period it takes for the Moon to rotate once on its axis relative to the Earth and the Sun. This period is about 29.5 Earth days, which is the time it takes for the Moon to go through all its phases, from new moon to full moon and back again. To clarify, a lunar day is not the same as the time it takes the Moon to orbit the Earth, which is approximately 27.