Moon Phase Calculator

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Observer Desired Local Time - Valid year range is 2000 - 2036
Year: Month: Day: Time Zone:
Today is Sun, Feb 25, 2018 the moon is 10 days old, 81% illuminated and increasing.
PhaseLunation 224Lunation 225Lunation 226
New Moon Thu, Feb 15, 2018 4:06 PMSat, Mar 17, 2018 8:12 AMSun, Apr 15, 2018 8:58 PM
Waxing Crescent Moon Mon, Feb 19, 2018 9:38 AMTue, Mar 20, 2018 9:24 PMThu, Apr 19, 2018 6:52 AM
First Quarter Moon Fri, Feb 23, 2018 3:10 AMSat, Mar 24, 2018 10:36 AMSun, Apr 22, 2018 4:46 PM
Waxing Gibbous Moon Mon, Feb 26, 2018 11:31 AMTue, Mar 27, 2018 9:07 PMThu, Apr 26, 2018 6:23 AM
Full Moon Thu, Mar 1, 2018 7:52 PMSat, Mar 31, 2018 7:38 AMSun, Apr 29, 2018 7:59 PM
Waning Gibbous Moon Mon, Mar 5, 2018 1:06 PMWed, Apr 4, 2018 4:58 AMThu, May 3, 2018 8:34 PM
Third Quarter Moon Fri, Mar 9, 2018 6:21 AMSun, Apr 8, 2018 2:18 AMMon, May 7, 2018 9:09 PM
Waning Crescent Moon Tue, Mar 13, 2018 7:16 AMWed, Apr 11, 2018 11:38 PMThu, May 10, 2018 10:34 PM


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).