A moon at the new phase comes most nearly – for any particular month – to passing between the Earth and sun. New moon is May 15, 2018 at 11:48 UTC; translate UTC to your time.
New moons come once each month, as the moon orbits Earth. On the day of new moon – unless we’re viewing a total solar eclipse – we don’t see the new moon. That’s because a new moon rises when the sun rises. It sets when the sun sets. It crosses the sky with the sun during the day. Its fully illuminated face, or day side, is turned entirely away from us.
It’s only as the moon moves in orbit, as its lighted hemisphere begins to come into view from Earth, that we can see it in our sky. Then we see the moon in the west after sunset as a slim waxing crescent – what some call a young moon.
This month’s new moon marks the start of the Islamic holy month of Ramadan. Read more: When does Ramadan begin in 2018?
Bottom line: As the moon orbits Earth, it changes phase in an orderly way. New moon comes on May 15 at 11:48 UTC.
Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.