Moon phase on July 21, 2003

Last Quarter, 53%
🌗 Last Quarter
Monday, July 21, 2003 · at noon (Brasília)
Illumination: 53% Age: 21.8 days Cycle: 74%
Home → Moon phase → July 21, 2003

On Monday, July 21, 2003 the Moon was in its last quarter phase, with 53% of its disk illuminated and an age of 21.8 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
Illumination53%
Moon age21.8 days
Day of the weekMonday
Last new moonJune 29, 2003 at 15:39
Next full moonAugust 12, 2003 at 01:48 (in 21.6 days)
Next new moonJuly 29, 2003 at 03:53 (in 7.7 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.

FriJul 18Waning Gibbous, 82%82%Waning GibbousSatJul 19Waning Gibbous, 73%73%Waning GibbousSunJul 20Waning Gibbous, 64%64%Waning Gibbous
MonJul 21Last Quarter, 53%53%Last Quarter
TueJul 22Last Quarter, 42%42%Last QuarterWedJul 23Waning Crescent, 32%32%Waning CrescentThuJul 24Waning Crescent, 23%23%Waning Crescent

← July 20, 2003 July 22, 2003 →

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 July 21, 2003 it had completed 74% of the cycle that began with the new moon on June 29, 2003.

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 July 21, 2003. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on July 21, 2003?

On July 21, 2003 the Moon was in its last quarter phase, with 53% 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: 21.8 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after July 21, 2003 falls on August 12, 2003 at 01:48 Brasília time.

When is the next new moon after that date?

The next new moon after July 21, 2003 falls on July 29, 2003 at 03:53 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.