Waxing Gibbous Moon Phase


What is a waxing gibbous moon? The waxing gibbous moon, is defined to occur when the Moon appears to be more than one-half but not fully illuminated by direct sunlight. Because the fraction of the Moon’s disk that is illuminated is increasing, we consider the Moon to be “waxing.” Each new lunar cycle is measured beginning at each new moon and the waxing crescent moon occurs when the Moon is more than one-quarter but less than one-half of the way around the sky (i.e., along its orbit) from new moon.

Waxing Gibbous Moon Dates / Next Waxing Gibbous Moon

When is the next waxing gibbous moon? A waxing gibbous moon is seen one to two weeks after a new moon. The average calendrical month, which is 1/12 of a year, is about 30.44 days, while the Moon’s phase (synodic) cycle repeats on average every 29.53 days. Therefore the timing of the Moon’s phases shifts by an average of almost one day for each successive month. To find out the waxing gibbous moon dates, please see the waxing gibbous moon calendar below.

Waxing Gibbous Moon and The Moon Phases

Waxing Gibbous Moon

Waxing Gibbous Moon

The waxing gibbous moon happens when the moon is between a 45 and 90 degree angle with respect to the Earth and Sun. So we are seeing more than half of the moon illuminated and less than half in shadow. The word gibbous refers to phases where the moon is more than half illuminated. “Waxing” essentially means growing or increasing in illumination. Each evening, as the moon’s orbital motion carries it towards the Earth-sun line, we see more of the moon’s day side.

Each lunar cycle begins with a new moon. As the Moon moves eastward away from the Sun in the sky, we see a bit more of the sunlit side of the Moon each night. We call this waxing. After the new moon, the sunlit portion is increasing, but less than half illuminated, so it is a waxing crescent moon. When half of the Moon’s disc is illuminated, we call it the first quarter moon. As the sunlit portion continues to increase, now more than half illuminated, it becomes waxing gibbous moon. When the Moon reaches maximum illumination, a full moon, the Moon has completed one half of the lunar month.

During the second half of the lunar month, the Moon grows thinner each night. We call this waning. The waning gibbous moon phase occurs first, followed by the last quarter moon when half of the Moon’s disc is illuminated. Next is the waning crescent moon, which wanes until the illumination is completely gone; a new moon.

Waxing Crescent Moon Calendar 2019

The waxing crescent moon calendar for 2019 is expressed in Coordinated Universal Time (UT), the international basis for other time zones, and occurs on the days between each first quarter moon and full moon. On these days, a waxing gibbous moon rises during the hours between noon and sunset. It sets in the wee hours after midnight. Astronomers call one lunar cycle a lunation. For waxing gibbous moon times in your city, please use the Time Zone Converter. You may also simply subtract five (5) hours to get to U.S. Eastern Time.

Full MoonYearDateTimeDay
Wolf Moon2019Jan 2105:16Mon
Snow Moon2019Feb 1915:53Tue
Worm Moon2019Mar 2101:43Thu
Pink Moon2019Apr 1911:12Fri
Flower Moon2019May 1821:11Sat
Strawberry Moon2019Jun 1708:31Mon
Buck Moon2019Jul 1621:38Tue
Sturgeon Moon2019Aug 1512:29Thu
Harvest Moon2019Sep 1404:33Sat
Hunters Moon2019Oct 1321:08Sun
Beaver Moon2019Nov 1213:34Tue
Cold Moon2019Dec 1205:12Thu

Gibbous Moon


Any moon that appears more than half lighted but less than full is called a gibbous moon. The word gibbous comes from a root word that means hump-backed. You can see the hump-backed shape of the waxing gibbous moon.

Popular Full Moon Calendars

Some popular full moon calendars, in addition to the Waxing Gibbous Moon Calendar, include the following: Moon Calendar 2011, Moon Calendar 2012, Moon Calendar 2013, Moon Calendar 2014, Moon Calendar 2015, Moon Calendar 2016, Moon Calendar 2017, Moon Calendar 2018, Moon Calendar 2019, Moon Calendar 2020.

You can also check out our Full Moon Calendar, Lunar Calendar, Lunar Eclipse Calendar and Solar Eclipse Calendar!