Today the Moon will be in a Third Quarter phase. Sometimes called a Last Quarter Moon, this phase occurs roughly 3 weeks after the New Moon when the Moon is three quarter of the way through it’s orbit around the earth. If you live in the northern hemisphere the Moons left side will be illuminated and the right side will be dark. For those of you in the southern hemisphere it will be the opposite with the right side illuminated. On the day of the Third Quarter phase the Moon will rise around midnight on the eastern horizon and set in the west around noon the next day. In the days following the Third Quarter Phase the Moon’s illumination will decrees each day until the New Moon.
Visit the May 2021 Moon Phases Calendar to see all the daily moon phase for this month.
Today’s Last Quarter Phase
The Last Quarter on May 3 has an illumination of 53%. This is the percentage of the Moon illuminated by the Sun. The illumination is constantly changing and can vary up to 10% a day. On May 3 the Moon is 21.82 days old. This refers to how many days it has been since the last New Moon. It takes 29.53 days for the Moon to orbit the Earth and go through the lunar cycle of all 8 Moon phases.
You can use this link to go forward or backward in time for Moon phase information. If you are curious you can even find out what phase the Moon was in when you or anyone else, you know was on the date the person was born.