Phases of the Moon 2024-2025
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2024, Graphics, 2025, Definitions



Eastern Time Zone/US & Canada
(GMT-05:00)

Eastern Time Zone/US & Canada
(GMT-05:00)

 New Moon -- the Moon is not illuminated by direct sunlight.

 Waxing Crescent -- the visible Moon is partly but less than one-half illuminated by direct sunlight while the illuminated part is increasing.

 First Quarter -- one-half of the Moon appears illuminated by direct sunlight while the illuminated part is increasing.

 Waxing Gibbous -- the Moon is more than one-half but not fully illuminated by direct sunlight while the illuminated part is increasing.
NOTE:  Gibbous etymology: Middle English, from Late Latin gibbosus meaning humpbacked, from Latin gibbus meaning hump.

 Full Moon -- the visible Moon is fully illuminated by direct sunlight.

 Waning Gibbous -- the Moon is less than fully but more than one-half illuminated by direct sunlight while the illuminated part is decreasing.

 Last Quarter -- one-half of the Moon appears illuminated by direct sunlight while the illuminated part is decreasing.

 Waning Crescent -- the Moon is partly but less than one-half illuminated by direct sunlight while the illuminated part is decreasing.
NOTE:  Following Waning Crescent is a New Moon, beginning a repetition of the complete phase cycle of 29.5 days average duration.

(Information courtesy of  USNO)

© 2015 Glenn McCoy

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