Moon Phases Calendar September 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

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