Here's why:

* The Moon's Rotation: The Moon rotates on its axis once every 27.3 days (approximately). This rotation is synchronized with its orbit around Earth.

* Tidally Locked: This means the Moon always shows the same face towards Earth.

* Day and Night on the Moon: Due to this synchronization, one side of the Moon faces the Sun for about 14 Earth days, experiencing constant sunlight. The other side remains in darkness for the same duration.

So, while a "day" on the Moon is the same as its orbital period (27.3 days), the "daylight" period on the Moon is about 14 Earth days.