Moon Phases Calendar May 2021

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Interactive moon phases tool

Ready to explore other moon phases? This tool shows the current moon phase and allows you to shift the phases and see how the moon is illuminated at each phase.

Credit: NASA

«May 2021»
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
right
Saturday, May 1st, 2021
Waning Gibbous
2
right
Sunday, May 2nd, 2021
Waning Gibbous
3
right
Monday, May 3rd, 2021
Waning Gibbous
4
right
Tuesday, May 4th, 2021
Last Quarter
5
right
Wednesday, May 5th, 2021
Last Quarter
6
left
right
Thursday, May 6th, 2021
Waning Cresent
7
left
right
Friday, May 7th, 2021
Waning Cresent
8
left
right
Saturday, May 8th, 2021
Waning Cresent
9
left
right
Sunday, May 9th, 2021
Waning Cresent
10
left
right
Monday, May 10th, 2021
Waning Cresent
11
left
right
Tuesday, May 11th, 2021
New Moon
12
left
right
Wednesday, May 12th, 2021
New Moon
13
left
right
Thursday, May 13th, 2021
Waxing Cresent
14
left
right
Friday, May 14th, 2021
Waxing Cresent
15
left
right
Saturday, May 15th, 2021
Waxing Cresent
16
left
right
Sunday, May 16th, 2021
Waxing Cresent
17
left
right
Monday, May 17th, 2021
Waxing Cresent
18
right
Tuesday, May 18th, 2021
First Quarter
19
right
Wednesday, May 19th, 2021
First Quarter
20
right
Thursday, May 20th, 2021
Waxing Gibbous
21
right
Friday, May 21st, 2021
Waxing Gibbous
22
right
Saturday, May 22nd, 2021
Waxing Gibbous
23
right
Sunday, May 23rd, 2021
Waxing Gibbous
24
right
Monday, May 24th, 2021
Waxing Gibbous
25
right
Tuesday, May 25th, 2021
Waxing Gibbous
26
Wednesday, May 26th, 2021
Full Moon
27
right
Thursday, May 27th, 2021
Waning Gibbous
28
right
Friday, May 28th, 2021
Waning Gibbous
29
right
Saturday, May 29th, 2021
Waning Gibbous
30
right
Sunday, May 30th, 2021
Waning Gibbous
31
right
Monday, May 31st, 2021
Waning Gibbous
Moon phase image

Moon phases software screen saver.

If you are interested in the phases of the moon or you like night sky screensavers, download the StarMessage screensaver for Microsoft Windows and Apple MacOS (including Mojave and Catalina).
The screensaver displays the moon in its current moon phase, reminds you about the upcoming full moon dates, shows you the names of the full moon, and does much more.

 

Download It's free

 

Diagram explaining the moon phases

This diagram shows the relative positions of the Sun, the Moon and earth and explains how the different moon phases appear.

The visible part of the moon is the part of the moon's surface that gets hit by the sunlight. The rest of the moon disc is almost invisible.

The moon phases are not caused by the shadow of the earth on to the moon. It is the moon's own shadow at the part of its surface that is not hit by the sunlight.

In other words, the visible "sunny" part is made of the places where there is "day" on the moon and the shadow part is where there is "night".

Moon phases diagram explained. Sun, Earth, Moon

Credit: NASA/JPL-Caltech.