Moon phase on March 31, 1983

Waning Gibbous, 95%
🌖 Waning Gibbous
Thursday, March 31, 1983 · at noon (Brasília)
Illumination: 95% Age: 16.9 days Cycle: 57%
Home → Moon phase → March 31, 1983

On Thursday, March 31, 1983 the Moon was in its waning gibbous phase, with 95% of its disk illuminated and an age of 16.9 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
Illumination95%
Moon age16.9 days
Day of the weekThursday
Last new moonMarch 14, 1983 at 14:43
Next full moonApril 27, 1983 at 03:30 (in 26.6 days)
Next new moonApril 13, 1983 at 04:58 (in 12.7 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.

MonMar 28Full Moon, 99%99%Full MoonTueMar 29Full Moon, 100%100%Full MoonWedMar 30Waning Gibbous, 99%99%Waning Gibbous
ThuMar 31Waning Gibbous, 95%95%Waning Gibbous
FriApr 1Waning Gibbous, 90%90%Waning GibbousSatApr 2Waning Gibbous, 82%82%Waning GibbousSunApr 3Waning Gibbous, 74%74%Waning Gibbous

← March 30, 1983 April 1, 1983 →

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 March 31, 1983 it had completed 57% of the cycle that began with the new moon on March 14, 1983.

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 March 31, 1983. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on March 31, 1983?

On March 31, 1983 the Moon was in its waning gibbous phase, with 95% 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: 16.9 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after March 31, 1983 falls on April 27, 1983 at 03:30 Brasília time.

When is the next new moon after that date?

The next new moon after March 31, 1983 falls on April 13, 1983 at 04:58 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.