Moon Phase Calculator

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Observer Desired Local Time - Valid year range is 2000 - 2036
Year: Month: Day: Time Zone:
Today is Wed, Oct 23, 2019 the moon is 26 days old, 19% illuminated and decreasing.
PhaseLunation 244Lunation 245Lunation 246
New Moon Sat, Sep 28, 2019 1:27 PMSun, Oct 27, 2019 10:39 PMTue, Nov 26, 2019 10:06 AM
Waxing Crescent Moon Wed, Oct 2, 2019 12:37 AMThu, Oct 31, 2019 2:02 PMSat, Nov 30, 2019 6:03 AM
First Quarter Moon Sat, Oct 5, 2019 11:48 AMMon, Nov 4, 2019 5:24 AMWed, Dec 4, 2019 1:59 AM
Waxing Gibbous Moon Wed, Oct 9, 2019 1:58 PMFri, Nov 8, 2019 7:00 AMSun, Dec 8, 2019 1:06 AM
Full Moon Sun, Oct 13, 2019 4:09 PMTue, Nov 12, 2019 8:35 AMThu, Dec 12, 2019 12:13 AM
Waning Gibbous Moon Thu, Oct 17, 2019 11:54 AMSat, Nov 16, 2019 12:23 AMSun, Dec 15, 2019 12:05 PM
Third Quarter Moon Mon, Oct 21, 2019 7:40 AMTue, Nov 19, 2019 4:12 PMWed, Dec 18, 2019 11:58 PM
Waning Crescent Moon Thu, Oct 24, 2019 3:10 PMSat, Nov 23, 2019 1:09 AMSat, Dec 21, 2019 11:59 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).