September 2027 Moon Phase Calendar

Updated · Daily moon data sampled at 8:00 p.m. Eastern Time (UTC shown where relevant)

The daily phase and illumination below are sampled at 8:00 p.m. Eastern Time. Principal phases are exact astronomical instants. Moonrise is for New York City and may occur on a different local date elsewhere.

May 2026 Moon Phase Calendar — 13-month

Gregorian dates: April 23, 2026 – May 20, 2026.

Switching keeps the reference date, April 23, 2026. Weekday headings follow the fixed calendar, not Gregorian weekdays. Each month has four complete weeks; Sol sits between June and July. The detail tables below keep their stated Gregorian date ranges.

May 2026 — International Fixed Calendar, Eastern Time. Gregorian date shown below each day.
SundayMondayTuesdayWednesdayThursdayFridaySaturday
First Quarter, 48.9% illuminated48.9%April 23 First Quarter 10:31 p.m. EDT First Quarter, 59.9% illuminated59.9%April 24 First Quarter, 70.1% illuminated70.1%April 25 Waxing Gibbous, 79.2% illuminated79.2%April 26 Waxing Gibbous, 86.9% illuminated86.9%April 27 Waxing Gibbous, 92.9% illuminated92.9%April 28 Full Moon, 97.1% illuminated97.1%April 29
Full Moon, 99.4% illuminated99.4%April 30 Full Moon, 99.8% illuminated99.8%May 1 Full Moon 1:23 p.m. EDT Full Moon, 98.3% illuminated98.3%May 2 Waning Gibbous, 95.1% illuminated95.1%May 3 Waning Gibbous, 90.3% illuminated90.3%May 4 Waning Gibbous, 84.1% illuminated84.1%May 5 Waning Gibbous, 76.7% illuminated76.7%May 6
Last Quarter, 68.2% illuminated68.2%May 7 Last Quarter, 58.8% illuminated58.8%May 8 Last Quarter, 49% illuminated49%May 9 Last Quarter 5:10 p.m. EDT Last Quarter, 38.8% illuminated38.8%May 10 Waning Crescent, 28.9% illuminated28.9%May 11 Waning Crescent, 19.5% illuminated19.5%May 12 Waning Crescent, 11.4% illuminated11.4%May 13
Waning Crescent, 5.1% illuminated5.1%May 14 New Moon, 1.2% illuminated1.2%May 15 New Moon, 0.2% illuminated0.2%May 16 New Moon 4:00 p.m. EDT New Moon, 2.3% illuminated2.3%May 17 Waxing Crescent, 7.2% illuminated7.2%May 18 Waxing Crescent, 14.7% illuminated14.7%May 19 Waxing Crescent, 23.9% illuminated23.9%May 20

Daily phase names group the cycle into eight broad phase sectors, using progress between exact astronomical events. They describe the 8 p.m. Eastern sample, not the instant of a new moon, quarter moon, or full moon. The tables list those exact principal-phase instants separately.

September 2027 Moon Phases — Exact Times

Principal lunar phases in September 2027, with Eastern and UTC civil dates
PhaseDateTime (ET)Time (UTC)13 month date
First Quarter2:31 p.m. EDT
6:31 p.m. UTC		August 26, 2027
Full Moon7:03 p.m. EDT
11:03 p.m. UTC		September 6, 2027
Last Quarter6:20 a.m. EDT
10:20 a.m. UTC		September 14, 2027
New Moon10:35 p.m. EDT
2:35 a.m. UTC		September 20, 2027

Daily Moon Phase, Illumination, and Moonrise

Daily lunar conditions in September 2027; phase and illumination sampled at 8:00 p.m. Eastern
DatePhase at 8 p.m. ETIlluminationNYC moonrise (ET / UTC)13 month date
New Moon, 2.4% illuminatedNew Moon2.4%, 7:28 a.m. EDT
, 11:28 a.m. UTC		August 20, 2027
Waxing Crescent, 7.4% illuminatedWaxing Crescent7.4%, 8:44 a.m. EDT
, 12:44 p.m. UTC		August 21, 2027
Waxing Crescent, 14.4% illuminatedWaxing Crescent14.4%, 9:58 a.m. EDT
, 1:58 p.m. UTC		August 22, 2027
Waxing Crescent, 23% illuminatedWaxing Crescent23%, 11:10 a.m. EDT
, 3:10 p.m. UTC		August 23, 2027
Waxing Crescent, 32.5% illuminatedWaxing Crescent32.5%, 12:21 p.m. EDT
, 4:21 p.m. UTC		August 24, 2027
First Quarter, 42.4% illuminatedFirst Quarter42.4%, 1:28 p.m. EDT
, 5:28 p.m. UTC		August 25, 2027
First Quarter, 52.4% illuminatedFirst Quarter52.4%, 2:29 p.m. EDT
, 6:29 p.m. UTC		August 26, 2027
First Quarter, 62% illuminatedFirst Quarter62%, 3:23 p.m. EDT
, 7:23 p.m. UTC		August 27, 2027
Waxing Gibbous, 71% illuminatedWaxing Gibbous71%, 4:07 p.m. EDT
, 8:07 p.m. UTC		August 28, 2027
Waxing Gibbous, 79.2% illuminatedWaxing Gibbous79.2%, 4:45 p.m. EDT
, 8:45 p.m. UTC		September 1, 2027
Waxing Gibbous, 86.3% illuminatedWaxing Gibbous86.3%, 5:16 p.m. EDT
, 9:16 p.m. UTC		September 2, 2027
Waxing Gibbous, 92.1% illuminatedWaxing Gibbous92.1%, 5:42 p.m. EDT
, 9:42 p.m. UTC		September 3, 2027
Full Moon, 96.4% illuminatedFull Moon96.4%, 6:05 p.m. EDT
, 10:05 p.m. UTC		September 4, 2027
Full Moon, 99.1% illuminatedFull Moon99.1%, 6:27 p.m. EDT
, 10:27 p.m. UTC		September 5, 2027
Full Moon, 99.9% illuminatedFull Moon99.9%, 6:47 p.m. EDT
, 10:47 p.m. UTC		September 6, 2027
Full Moon, 98.8% illuminatedFull Moon98.8%, 7:09 p.m. EDT
, 11:09 p.m. UTC		September 7, 2027
Waning Gibbous, 95.8% illuminatedWaning Gibbous95.8%, 7:31 p.m. EDT
, 11:31 p.m. UTC		September 8, 2027
Waning Gibbous, 90.8% illuminatedWaning Gibbous90.8%, 7:57 p.m. EDT
, 11:57 p.m. UTC		September 9, 2027
Waning Gibbous, 83.9% illuminatedWaning Gibbous83.9%, 8:28 p.m. EDT
, 12:28 a.m. UTC		September 10, 2027
Waning Gibbous, 75.5% illuminatedWaning Gibbous75.5%, 9:06 p.m. EDT
, 1:06 a.m. UTC		September 11, 2027
Last Quarter, 65.7% illuminatedLast Quarter65.7%, 9:53 p.m. EDT
, 1:53 a.m. UTC		September 12, 2027
Last Quarter, 54.9% illuminatedLast Quarter54.9%, 10:51 p.m. EDT
, 2:51 a.m. UTC		September 13, 2027
Last Quarter, 43.7% illuminatedLast Quarter43.7%, 11:58 p.m. EDT
, 3:58 a.m. UTC		September 14, 2027
Last Quarter, 32.6% illuminatedLast Quarter32.6%No moonrise on this Eastern calendar dateSeptember 15, 2027
Waning Crescent, 22.2% illuminatedWaning Crescent22.2%, 1:12 a.m. EDT
, 5:12 a.m. UTC		September 16, 2027
Waning Crescent, 13.2% illuminatedWaning Crescent13.2%, 2:29 a.m. EDT
, 6:29 a.m. UTC		September 17, 2027
Waning Crescent, 6.3% illuminatedWaning Crescent6.3%, 3:46 a.m. EDT
, 7:46 a.m. UTC		September 18, 2027
New Moon, 1.8% illuminatedNew Moon1.8%, 5:02 a.m. EDT
, 9:02 a.m. UTC		September 19, 2027
New Moon, 0.2% illuminatedNew Moon0.2%, 6:17 a.m. EDT
, 10:17 a.m. UTC		September 20, 2027
New Moon, 1.3% illuminatedNew Moon1.3%, 7:32 a.m. EDT
, 11:32 a.m. UTC		September 21, 2027

“No moonrise” means no rise occurs during that midnight-to-midnight Eastern calendar date at the New York City observer location; it does not mean the moon never rises.