Moon phase on September 12, 1976

Waning Gibbous, 87%
🌖 Waning Gibbous
Sunday, September 12, 1976 · at noon (Brasília)
Illumination: 87% Age: 18.2 days Cycle: 62%

On Sunday, September 12, 1976 the Moon was in its waning gibbous phase, with 87% of its disk illuminated and an age of 18.2 days since the last new moon. The lit part starts to shrink. The Moon rises a few hours after dusk and is still in the sky when day breaks.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌖 Waning Gibbous
Illumination87%
Moon age18.2 days
Day of the weekSunday
Last new moonAugust 25, 1976 at 08:00
Next full moonOctober 8, 1976 at 01:55 (in 25.6 days)
Next new moonSeptember 23, 1976 at 16:55 (in 11.2 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.

← September 11, 1976 September 13, 1976 →

About the waning gibbous

The lit part starts to shrink. The Moon rises a few hours after dusk and is still in the sky when day breaks. The phase name comes from the Moon's position in its 29.53-day cycle: on September 12, 1976 it had completed 62% of the cycle that began with the new moon on August 25, 1976.

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 September 12, 1976. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on September 12, 1976?

On September 12, 1976 the Moon was in its waning gibbous phase, with 87% 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: 18.2 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after September 12, 1976 falls on October 8, 1976 at 01:55 Brasília time.

When is the next new moon after that date?

The next new moon after September 12, 1976 falls on September 23, 1976 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.