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Moon Phases Calendar January 2011
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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
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
Saturday, January 1st, 2011
Waning Cresent 2
Sunday, January 2nd, 2011
Waning Cresent 3
Monday, January 3rd, 2011
Waning Cresent 4
Tuesday, January 4th, 2011
New Moon 5
Wednesday, January 5th, 2011
New Moon 6
Thursday, January 6th, 2011
Waxing Cresent 7
Friday, January 7th, 2011
Waxing Cresent 8
Saturday, January 8th, 2011
Waxing Cresent 9
Sunday, January 9th, 2011
Waxing Cresent 10
Monday, January 10th, 2011
Waxing Cresent 11
Tuesday, January 11th, 2011
Waxing Cresent 12
Wednesday, January 12th, 2011
First Quarter 13
Thursday, January 13th, 2011
Waxing Gibbous 14
Friday, January 14th, 2011
Waxing Gibbous 15
Saturday, January 15th, 2011
Waxing Gibbous 16
Sunday, January 16th, 2011
Waxing Gibbous 17
Monday, January 17th, 2011
Waxing Gibbous 18
Tuesday, January 18th, 2011
Waxing Gibbous 19
Wednesday, January 19th, 2011
Full Moon 20
Thursday, January 20th, 2011
Full Moon 21
Friday, January 21st, 2011
Waning Gibbous 22
Saturday, January 22nd, 2011
Waning Gibbous 23
Sunday, January 23rd, 2011
Waning Gibbous 24
Monday, January 24th, 2011
Waning Gibbous 25
Tuesday, January 25th, 2011
Waning Gibbous 26
Wednesday, January 26th, 2011
Waning Gibbous 27
Thursday, January 27th, 2011
Last Quarter 28
Friday, January 28th, 2011
Waning Cresent 29
Saturday, January 29th, 2011
Waning Cresent 30
Sunday, January 30th, 2011
Waning Cresent 31
Monday, January 31st, 2011
Waning Cresent 
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.
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".
Credit: NASA/JPL-Caltech.