* New Moon: The new moon is invisible to the naked eye, as it is between the Earth and the Sun. While technically lasting only a single moment, it's often considered to be the "new moon phase" for the 1-2 days before and after the exact moment.

* Waxing Crescent: This phase is a thin sliver of moon, growing bigger each night, and can last for 1-2 nights depending on the time of the year.

* Waning Crescent: The opposite of waxing crescent, this phase shows a shrinking sliver of moon. It can also last for 1-2 nights.

* Full Moon: While the full moon is visible for several days, the peak of its illumination - where it appears roundest and brightest - lasts for a single night.

It's important to note that the exact length of each phase can vary slightly based on the specific orbit of the moon and the observer's location on Earth.