December 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.
December 2027 Moon Phase Calendar — 13-month
Gregorian dates: December 3, 2027 – December 30, 2027; plus Year Day on December 31, 2027.
Switching keeps the reference date, December 3, 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 |
|---|---|---|---|---|---|---|
 30.1%December 3
|
 39%December 4
|
48.4%December 5
|
57.9%December 6
First Quarter 12:22 a.m. EST
|
67.3%December 7
|
 76.3%December 8
|
84.4%December 9
|
|
91.3%December 10
|
 96.4%December 11
|
99.3%December 12
|
99.7%December 13
Full Moon 11:08 a.m. EST
|
97.4%December 14
|
 92.4%December 15
|
85%December 16
|
|
75.7%December 17
|
 65.1%December 18
|
54%December 19
|
42.8%December 20
Last Quarter 4:10 a.m. EST
|
32.2%December 21
|
 22.6%December 22
|
14.4%December 23
|
|
7.9%December 24
|
 3.3%December 25
|
0.7%December 26
|
0.1%December 27
New Moon 3:12 p.m. EST
|
1.4%December 28
|
4.5%December 29
|
9.2%December 30
|
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.
December 2026 Moon Phases — Exact Times
| Phase | Date | Time (ET) | Time (UTC) | 13 month date |
|---|---|---|---|---|
| Last Quarter | 1:08 a.m. EST | 6:08 a.m. UTC | November 27, 2026 | |
| New Moon | 7:51 p.m. EST | 12:51 a.m. UTC | December 6, 2026 | |
| First Quarter | 12:42 a.m. EST | 5:42 a.m. UTC | December 15, 2026 | |
| Full Moon | 8:28 p.m. EST | 1:28 a.m. UTC | December 21, 2026 | |
| Last Quarter | 1:59 p.m. EST | 6:59 p.m. UTC | December 28, 2026 |
Special events and calculation notes
- : Supermoon (geocentric distance <= 360,000 km)
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.