Moon phase on August 21, 1969

First Quarter, 61%
🌓 First Quarter
Thursday, August 21, 1969 · at noon (Brasília)
Illumination: 61% Age: 8.4 days Cycle: 28%
Home → Moon phase → August 21, 1969

On Thursday, August 21, 1969 the Moon was in its first quarter phase, with 61% of its disk illuminated and an age of 8.4 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
Illumination61%
Moon age8.4 days
Day of the weekThursday
Last new moonAugust 13, 1969 at 02:16
Next full moonAugust 27, 1969 at 07:32 (in 5.8 days)
Next new moonSeptember 11, 1969 at 16:55 (in 21.2 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.

MonAug 18Waxing Crescent, 29%29%Waxing CrescentTueAug 19First Quarter, 39%39%First QuarterWedAug 20First Quarter, 50%50%First Quarter
ThuAug 21First Quarter, 61%61%First Quarter
FriAug 22Waxing Gibbous, 71%71%Waxing GibbousSatAug 23Waxing Gibbous, 80%80%Waxing GibbousSunAug 24Waxing Gibbous, 88%88%Waxing Gibbous

← August 20, 1969 August 22, 1969 →

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 August 21, 1969 it had completed 28% of the cycle that began with the new moon on August 13, 1969.

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 21, 1969. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on August 21, 1969?

On August 21, 1969 the Moon was in its first quarter phase, with 61% 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: 8.4 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after August 21, 1969 falls on August 27, 1969 at 07:32 Brasília time.

When is the next new moon after that date?

The next new moon after August 21, 1969 falls on September 11, 1969 at 16:55 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.