Moon phase on August 12, 2039

Last Quarter, 48%
🌗 Last Quarter
Friday, August 12, 2039 · at noon (Brasília)
Illumination: 48% Age: 22.3 days Cycle: 75%

On Friday, August 12, 2039 the Moon will be in its last quarter phase, with 48% of its disk illuminated and an age of 22.3 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
Illumination48%
Moon age22.3 days
Day of the weekFriday
Last new moonJuly 21, 2039 at 04:54
Next full moonSeptember 2, 2039 at 16:23 (in 21.2 days)
Next new moonAugust 19, 2039 at 17:50 (in 7.2 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.

← August 11, 2039 August 13, 2039 →

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 August 12, 2039 it had completed 75% of the cycle that began with the new moon on July 21, 2039.

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 August 12, 2039. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on August 12, 2039?

On August 12, 2039 the Moon will be in its last quarter phase, with 48% 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: 22.3 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after August 12, 2039 falls on September 2, 2039 at 16:23 Brasília time.

When is the next new moon after that date?

The next new moon after August 12, 2039 falls on August 19, 2039 at 17:50 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.