Moon Phase Calculator

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Observer Desired Local Time - Valid year range is 2000 - 2036
Year: Month: Day: Time Zone:
Today is Thu, Apr 26, 2018 the moon is 10 days old, 85% illuminated and increasing.
PhaseLunation 226Lunation 227Lunation 228
New Moon Sun, Apr 15, 2018 8:58 PMTue, May 15, 2018 6:48 AMWed, Jun 13, 2018 2:44 PM
Waxing Crescent Moon Thu, Apr 19, 2018 6:52 AMFri, May 18, 2018 2:49 PMSat, Jun 16, 2018 10:18 PM
First Quarter Moon Sun, Apr 22, 2018 4:46 PMMon, May 21, 2018 10:50 PMWed, Jun 20, 2018 5:52 AM
Waxing Gibbous Moon Thu, Apr 26, 2018 6:23 AMFri, May 25, 2018 4:05 PMSun, Jun 24, 2018 2:53 AM
Full Moon Sun, Apr 29, 2018 7:59 PMTue, May 29, 2018 9:20 AMWed, Jun 27, 2018 11:54 PM
Waning Gibbous Moon Thu, May 3, 2018 8:34 PMSat, Jun 2, 2018 11:26 AMMon, Jul 2, 2018 1:23 AM
Third Quarter Moon Mon, May 7, 2018 9:09 PMWed, Jun 6, 2018 1:32 PMFri, Jul 6, 2018 2:51 AM
Waning Crescent Moon Fri, May 11, 2018 1:59 PMSun, Jun 10, 2018 2:08 AMMon, Jul 9, 2018 1:25 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).