Moon phase on December 13, 2029

First Quarter, 57%
🌓 First Quarter
Thursday, December 13, 2029 · at noon (Brasília)
Illumination: 57% Age: 8.0 days Cycle: 27%

On Thursday, December 13, 2029 the Moon will be in its first quarter phase, with 57% of its disk illuminated and an age of 8.0 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
Illumination57%
Moon age8.0 days
Day of the weekThursday
Last new moonDecember 5, 2029 at 11:52
Next full moonDecember 20, 2029 at 19:46 (in 7.3 days)
Next new moonJanuary 3, 2030 at 23:49 (in 21.5 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.

← December 12, 2029 December 14, 2029 →

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 December 13, 2029 it had completed 27% of the cycle that began with the new moon on December 5, 2029.

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 December 13, 2029. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on December 13, 2029?

On December 13, 2029 the Moon will be in its first quarter phase, with 57% 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: 8.0 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after December 13, 2029 falls on December 20, 2029 at 19:46 Brasília time.

When is the next new moon after that date?

The next new moon after December 13, 2029 falls on January 3, 2030 at 23:49 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.