Moon Phase Calculator

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Observer Desired Local Time - Valid year range is 2000 - 2036
Year: Month: Day: Time Zone:
Today is Fri, Feb 21, 2020 the moon is 28 days old, 3% illuminated and decreasing.
PhaseLunation 248Lunation 249Lunation 250
New Moon Fri, Jan 24, 2020 4:43 PMSun, Feb 23, 2020 10:33 AMTue, Mar 24, 2020 4:29 AM
Waxing Crescent Moon Tue, Jan 28, 2020 6:42 PMThu, Feb 27, 2020 12:45 PMSat, Mar 28, 2020 4:55 AM
First Quarter Moon Sat, Feb 1, 2020 8:42 PMMon, Mar 2, 2020 2:58 PMWed, Apr 1, 2020 5:22 AM
Waxing Gibbous Moon Wed, Feb 5, 2020 11:38 AMFri, Mar 6, 2020 1:53 AMSat, Apr 4, 2020 1:29 PM
Full Moon Sun, Feb 9, 2020 2:34 AMMon, Mar 9, 2020 12:48 PMTue, Apr 7, 2020 9:36 PM
Waning Gibbous Moon Wed, Feb 12, 2020 9:56 AMThu, Mar 12, 2020 8:42 PMSat, Apr 11, 2020 7:46 AM
Third Quarter Moon Sat, Feb 15, 2020 5:18 PMMon, Mar 16, 2020 4:35 AMTue, Apr 14, 2020 5:57 PM
Waning Crescent Moon Wed, Feb 19, 2020 1:55 PMFri, Mar 20, 2020 4:32 AMSat, Apr 18, 2020 8:58 AM


Notes:
1. Use the Home link to return to the home page. Do not use the back button.
2. If more precise information is needed NASA has exact eclipse and moon phase data worked out for the entire century.
3. Time Zone is the number of hours the local time zone is offset from UTC(GMT), negative to the west and positive to the east.
Standard times are EST=-5, CST=-6, MST=-7 and PST=-8.
Daylight times are EDT=-4, CDT=-5, MDT=-6 and PDT=-7.
4. Lunation count starts with the first new moon in 2000 (1/6/2000) equals zero. Brown's Lunation Number is 953 greater.
5. Based on an algorithm developed by Jean Meeus (Astronomical Algorithms 1998).