Moon phase on January 13, 2021

New Moon, 0%
🌑 New Moon
Wednesday, January 13, 2021 · at noon (Brasília)
Illumination: 0% Age: 0.4 days Cycle: 1%

On Wednesday, January 13, 2021 the Moon was in its new moon phase, with 0% of its disk illuminated and an age of 0.4 days since the last new moon. The Moon sits between the Earth and the Sun and shows us its dark side. It is practically invisible in the sky, and the nights are darkest, which is ideal for stargazing.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌑 New Moon
Illumination0%
Moon age0.4 days
Day of the weekWednesday
Last new moonJanuary 13, 2021 at 02:00
Next full moonJanuary 28, 2021 at 16:16 (in 15.2 days)
Next new moonFebruary 11, 2021 at 16:05 (in 29.2 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.

← January 12, 2021 January 14, 2021 →

About the new moon

The Moon sits between the Earth and the Sun and shows us its dark side. It is practically invisible in the sky, and the nights are darkest, which is ideal for stargazing. The phase name comes from the Moon's position in its 29.53-day cycle: on January 13, 2021 it had completed 1% of the cycle that began with the new moon on January 13, 2021.

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 13, 2021. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on January 13, 2021?

On January 13, 2021 the Moon was in its new moon phase, with 0% 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: 0.4 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after January 13, 2021 falls on January 28, 2021 at 16:16 Brasília time.

When is the next new moon after that date?

The next new moon after January 13, 2021 falls on February 11, 2021 at 16:05 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.