Moon phase on July 18, 1997

Full Moon, 99%
🌕 Full Moon
Friday, July 18, 1997 · at noon (Brasília)
Illumination: 99% Age: 13.8 days Cycle: 47%

On Friday, July 18, 1997 the Moon was in its full moon phase, with 99% of its disk illuminated and an age of 13.8 days since the last new moon. The whole disk is lit: the Moon rises as the Sun sets and stays up all night. It is the brightest and most photographed phase.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌕 Full Moon
Illumination99%
Moon age13.8 days
Day of the weekFriday
Last new moonJuly 4, 1997 at 15:40
Next full moonJuly 20, 1997 at 00:21 (in 1.5 days)
Next new moonAugust 3, 1997 at 05:14 (in 15.7 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.

← July 17, 1997 July 19, 1997 →

About the full moon

The whole disk is lit: the Moon rises as the Sun sets and stays up all night. It is the brightest and most photographed phase. The phase name comes from the Moon's position in its 29.53-day cycle: on July 18, 1997 it had completed 47% of the cycle that began with the new moon on July 4, 1997.

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 18, 1997. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on July 18, 1997?

On July 18, 1997 the Moon was in its full moon phase, with 99% 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: 13.8 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after July 18, 1997 falls on July 20, 1997 at 00:21 Brasília time.

When is the next new moon after that date?

The next new moon after July 18, 1997 falls on August 3, 1997 at 05:14 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.