Moon phase on May 22, 1984

Last Quarter, 57%
🌗 Last Quarter
Tuesday, May 22, 1984 · at noon (Brasília)
Illumination: 57% Age: 21.5 days Cycle: 73%

On Tuesday, May 22, 1984 the Moon was in its last quarter phase, with 57% of its disk illuminated and an age of 21.5 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 age21.5 days
Day of the weekTuesday
Last new moonMay 1, 1984 at 00:45
Next full moonJune 13, 1984 at 11:42 (in 22.0 days)
Next new moonMay 30, 1984 at 13:48 (in 8.1 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.

← May 21, 1984 May 23, 1984 →

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 May 22, 1984 it had completed 73% of the cycle that began with the new moon on May 1, 1984.

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 May 22, 1984. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on May 22, 1984?

On May 22, 1984 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: 21.5 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after May 22, 1984 falls on June 13, 1984 at 11:42 Brasília time.

When is the next new moon after that date?

The next new moon after May 22, 1984 falls on May 30, 1984 at 13:48 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.