Moon phase on January 21, 2030

Waning Gibbous, 92%
🌖 Waning Gibbous
Monday, January 21, 2030 · at noon (Brasília)
Illumination: 92% Age: 17.5 days Cycle: 59%

On Monday, January 21, 2030 the Moon will be in its waning gibbous phase, with 92% of its disk illuminated and an age of 17.5 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
Illumination92%
Moon age17.5 days
Day of the weekMonday
Last new moonJanuary 3, 2030 at 23:49
Next full moonFebruary 18, 2030 at 03:20 (in 27.6 days)
Next new moonFebruary 2, 2030 at 13:07 (in 12.0 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.

← January 20, 2030 January 22, 2030 →

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 January 21, 2030 it had completed 59% of the cycle that began with the new moon on January 3, 2030.

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 January 21, 2030. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on January 21, 2030?

On January 21, 2030 the Moon will be in its waning gibbous phase, with 92% 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: 17.5 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after January 21, 2030 falls on February 18, 2030 at 03:20 Brasília time.

When is the next new moon after that date?

The next new moon after January 21, 2030 falls on February 2, 2030 at 13:07 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.