Moon Phase Calculator

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Observer Desired Local Time - Valid year range is 2000 - 2036
Year: Month: Day: Time Zone:
Today is Mon, Dec 9, 2019 the moon is 13 days old, 95% illuminated and increasing.
PhaseLunation 246Lunation 247Lunation 248
New Moon Tue, Nov 26, 2019 10:06 AMThu, Dec 26, 2019 12:14 AMFri, Jan 24, 2020 4:43 PM
Waxing Crescent Moon Sat, Nov 30, 2019 6:03 AMMon, Dec 30, 2019 12:00 AMTue, Jan 28, 2020 6:42 PM
First Quarter Moon Wed, Dec 4, 2019 1:59 AMThu, Jan 2, 2020 11:46 PMSat, Feb 1, 2020 8:42 PM
Waxing Gibbous Moon Sun, Dec 8, 2019 1:06 AMMon, Jan 6, 2020 7:04 PMWed, Feb 5, 2020 11:38 AM
Full Moon Thu, Dec 12, 2019 12:13 AMFri, Jan 10, 2020 2:22 PMSun, Feb 9, 2020 2:34 AM
Waning Gibbous Moon Sun, Dec 15, 2019 12:05 PMMon, Jan 13, 2020 11:10 PMWed, Feb 12, 2020 9:56 AM
Third Quarter Moon Wed, Dec 18, 2019 11:58 PMFri, Jan 17, 2020 7:59 AMSat, Feb 15, 2020 5:18 PM
Waning Crescent Moon Sun, Dec 22, 2019 12:06 PMTue, Jan 21, 2020 12:21 AMWed, Feb 19, 2020 8:39 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).