Moon Phases Calendar September 2025

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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 2025»
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
right
Monday, September 1st, 2025
Waxing Gibbous
2
right
Tuesday, September 2nd, 2025
Waxing Gibbous
3
right
Wednesday, September 3rd, 2025
Waxing Gibbous
4
right
Thursday, September 4th, 2025
Waxing Gibbous
5
right
Friday, September 5th, 2025
Waxing Gibbous
6
right
Saturday, September 6th, 2025
Waxing Gibbous
7
Sunday, September 7th, 2025
Full Moon
8
Monday, September 8th, 2025
Full Moon
9
right
Tuesday, September 9th, 2025
Waning Gibbous
10
right
Wednesday, September 10th, 2025
Waning Gibbous
11
right
Thursday, September 11th, 2025
Waning Gibbous
12
right
Friday, September 12th, 2025
Waning Gibbous
13
right
Saturday, September 13th, 2025
Waning Gibbous
14
right
Sunday, September 14th, 2025
Waning Gibbous
15
right
Monday, September 15th, 2025
Last Quarter
16
right
Tuesday, September 16th, 2025
Last Quarter
17
left
right
Wednesday, September 17th, 2025
Waning Cresent
18
left
right
Thursday, September 18th, 2025
Waning Cresent
19
left
right
Friday, September 19th, 2025
Waning Cresent
20
left
right
Saturday, September 20th, 2025
Waning Cresent
21
left
right
Sunday, September 21st, 2025
Waning Cresent
22
left
right
Monday, September 22nd, 2025
New Moon
23
left
right
Tuesday, September 23rd, 2025
New Moon
24
left
right
Wednesday, September 24th, 2025
Waxing Cresent
25
left
right
Thursday, September 25th, 2025
Waxing Cresent
26
left
right
Friday, September 26th, 2025
Waxing Cresent
27
left
right
Saturday, September 27th, 2025
Waxing Cresent
28
left
right
Sunday, September 28th, 2025
Waxing Cresent
29
right
Monday, September 29th, 2025
First Quarter
30
right
Tuesday, September 30th, 2025
First 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.