There is a new moon when the Moon lies almost between Earth and the Sun, so the side facing us is unlit. The new moon is therefore essentially invisible, and the night is at its darkest with no moonlight. Below you can see the upcoming new moons, calculated astronomically.
At new moon the Moon's lit side faces away from Earth, and the Moon also sits close to the Sun in the sky. It is therefore up during the day and sets around sunset. A couple of days after new moon, the thin waxing crescent appears low in the west after sunset.
The nights around new moon are the darkest in the lunar cycle, because there is no moonlight. That makes them ideal for observing stars, meteors and the Milky Way. Between two new moons the Moon passes through full moon and the other moon phases.
See also the moon today with moonrise and moonset for your location, or the whole month in the moon calendar.
See the upcoming new moons in the list above. The dates are calculated astronomically and updated continuously.
At new moon the Moon's lit side faces away from Earth, and the Moon sits close to the Sun in the sky. It is therefore essentially invisible and is up during the day.