Moon phase on October 28, 2021

Last Quarter, 49%
🌗 Last Quarter
Thursday, October 28, 2021 · at noon (Brasília)
Illumination: 49% Age: 22.2 days Cycle: 75%

On Thursday, October 28, 2021 the Moon was in its last quarter phase, with 49% of its disk illuminated and an age of 22.2 days since the last new moon. Half of the disk is lit again, on the opposite side from the first quarter. The Moon rises around midnight and is visible in the morning.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌗 Last Quarter
Illumination49%
Moon age22.2 days
Day of the weekThursday
Last new moonOctober 6, 2021 at 08:05
Next full moonNovember 19, 2021 at 05:58 (in 21.7 days)
Next new moonNovember 4, 2021 at 18:15 (in 7.3 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.

← October 27, 2021 October 29, 2021 →

About the last quarter

Half of the disk is lit again, on the opposite side from the first quarter. The Moon rises around midnight and is visible in the morning. The phase name comes from the Moon's position in its 29.53-day cycle: on October 28, 2021 it had completed 75% of the cycle that began with the new moon on October 6, 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 October 28, 2021. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on October 28, 2021?

On October 28, 2021 the Moon was in its last quarter phase, with 49% 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: 22.2 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after October 28, 2021 falls on November 19, 2021 at 05:58 Brasília time.

When is the next new moon after that date?

The next new moon after October 28, 2021 falls on November 4, 2021 at 18:15 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.