Moon phase on February 18, 2017

Last Quarter, 57%
🌗 Last Quarter
Saturday, February 18, 2017 · at noon (Brasília)
Illumination: 57% Age: 21.6 days Cycle: 73%

On Saturday, February 18, 2017 the Moon was in its last quarter phase, with 57% of its disk illuminated and an age of 21.6 days since the last new moon. Half of the disk is lit again, on the opposite side from the first quarter. The Moon rises around midnight and is visible in the morning.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌗 Last Quarter
Illumination57%
Moon age21.6 days
Day of the weekSaturday
Last new moonJanuary 27, 2017 at 22:07
Next full moonMarch 12, 2017 at 11:54 (in 22.0 days)
Next new moonFebruary 26, 2017 at 11:58 (in 8.0 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.

← February 17, 2017 February 19, 2017 →

About the last quarter

Half of the disk is lit again, on the opposite side from the first quarter. The Moon rises around midnight and is visible in the morning. The phase name comes from the Moon's position in its 29.53-day cycle: on February 18, 2017 it had completed 73% of the cycle that began with the new moon on January 27, 2017.

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 February 18, 2017. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on February 18, 2017?

On February 18, 2017 the Moon was in its last 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: 21.6 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after February 18, 2017 falls on March 12, 2017 at 11:54 Brasília time.

When is the next new moon after that date?

The next new moon after February 18, 2017 falls on February 26, 2017 at 11:58 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.