Moon phase on April 19, 2021

First Quarter, 51%
🌓 First Quarter
Monday, April 19, 2021 · at noon (Brasília)
Illumination: 51% Age: 7.5 days Cycle: 25%

On Monday, April 19, 2021 the Moon was in its first quarter phase, with 51% of its disk illuminated and an age of 7.5 days since the last new moon. Half of the disk is lit, about a week after the new moon. The Moon is easy to see in the early evening and sets around midnight.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌓 First Quarter
Illumination51%
Moon age7.5 days
Day of the weekMonday
Last new moonApril 11, 2021 at 23:31
Next full moonApril 27, 2021 at 00:31 (in 7.5 days)
Next new moonMay 11, 2021 at 16:00 (in 22.2 days)

The Moon on the surrounding days

Compare the phase and illumination over the three days before and after. Click a day to open its page.

← April 18, 2021 April 20, 2021 →

About the first quarter

Half of the disk is lit, about a week after the new moon. The Moon is easy to see in the early evening and sets around midnight. The phase name comes from the Moon's position in its 29.53-day cycle: on April 19, 2021 it had completed 25% of the cycle that began with the new moon on April 11, 2021.

Looking for another date, such as a birthday? Use the Moon phase on the day I was born tool, see the Moon phase today page with the lunar calendar, or find the day of the week of April 19, 2021. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on April 19, 2021?

On April 19, 2021 the Moon was in its first quarter phase, with 51% of the disk lit (calculated at noon Brasília time).

How old is the Moon on that date?

The age is the time since the last new moon: 7.5 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after April 19, 2021 falls on April 27, 2021 at 00:31 Brasília time.

When is the next new moon after that date?

The next new moon after April 19, 2021 falls on May 11, 2021 at 16:00 Brasília time.

How is the Moon phase calculated?

With Jean Meeus's astronomical formulas for the instants of new, quarter and full moon. The age comes from the time since the last new moon and the illumination is (1 − cos(2π × cycle fraction)) / 2.

Is the phase the same everywhere in the world?

Yes, the phase and the illuminated percentage are the same across the planet at any given instant. Only the orientation changes: in the southern hemisphere a waxing Moon is lit on the left, in the northern one on the right.