August 2026 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.
September 2027 Moon Phase Calendar — 13-month
Gregorian dates: September 10, 2027 – October 7, 2027.
Switching keeps the reference date, October 1, 2027. 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.
| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
|---|---|---|---|---|---|---|
 79.2%September 10
|
86.3%September 11
|
92.1%September 12
|
 96.4%September 13
|
99.1%September 14
|
99.9%September 15
Full Moon 7:03 p.m. EDT
|
98.8%September 16
|
 95.8%September 17
|
90.8%September 18
|
83.9%September 19
|
75.5%September 20
|
 65.7%September 21
|
54.9%September 22
|
43.7%September 23
Last Quarter 6:20 a.m. EDT
|
|
32.6%September 24
|
 22.2%September 25
|
13.2%September 26
|
6.3%September 27
|
 1.8%September 28
|
0.2%September 29
New Moon 10:35 p.m. EDT
|
1.3%September 30
|
 4.9%October 1
|
10.7%October 2
|
18.1%October 3
|
26.6%October 4
|
 35.8%October 5
|
45.4%October 6
|
55%October 7
First Quarter 7:47 a.m. EDT
|
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.
August 2026 Moon Phases — Exact Times
| Phase | Date | Time (ET) | Time (UTC) | 13 month date |
|---|---|---|---|---|
| Last Quarter | 10:21 p.m. EDT | 2:21 a.m. UTC | July 21, 2026 | |
| New Moon | 1:36 p.m. EDT | 5:36 p.m. UTC | July 28, 2026 | |
| First Quarter | 10:46 p.m. EDT | 2:46 a.m. UTC | August 7, 2026 | |
| Full Moon | 12:18 a.m. EDT | 4:18 a.m. UTC | August 16, 2026 |
Special events and calculation notes
- : Total solar eclipse (NASA GSFC)
- : Partial lunar eclipse (NASA GSFC)
Eclipse classifications are from NASA GSFC. On this site, “supermoon” means a full moon with a computed geocentric distance of 360,000 km or less.
Daily Moon Phase, Illumination, and Moonrise
“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.