Astronomical annual overview

Moon calendar 2031

Every date of the Moon’s four primary astronomical phases. All dates and times are shown in Coordinated Universal Time (UTC).

UTC

Astronomical dates

Primary Moon phases in 2031

The list gives the instants of new moon, first quarter, full moon and last quarter. Every date and time is displayed in UTC.

New moon 12 dates

First quarter 12 dates

Full moon 13 dates

Last quarter 12 dates

January

Full moon Wednesday, January 8, 2031 18:25 UTC
Last quarter Thursday, January 16, 2031 12:47 UTC
New moon Thursday, January 23, 2031 04:30 UTC
First quarter Thursday, January 30, 2031 07:43 UTC

February

Full moon Friday, February 7, 2031 12:46 UTC
Last quarter Friday, February 14, 2031 22:49 UTC
New moon Friday, February 21, 2031 15:48 UTC

March

First quarter Saturday, March 1, 2031 04:02 UTC
Full moon Sunday, March 9, 2031 04:29 UTC
Last quarter Sunday, March 16, 2031 06:35 UTC
New moon Sunday, March 23, 2031 03:49 UTC
First quarter Monday, March 31, 2031 00:32 UTC

April

Full moon Monday, April 7, 2031 17:21 UTC
Last quarter Monday, April 14, 2031 12:57 UTC
New moon Monday, April 21, 2031 16:57 UTC
First quarter Tuesday, April 29, 2031 19:19 UTC

May

Full moon Wednesday, May 7, 2031 03:39 UTC
Last quarter Tuesday, May 13, 2031 19:06 UTC
New moon Wednesday, May 21, 2031 07:17 UTC
First quarter Thursday, May 29, 2031 11:19 UTC

June

Full moon Thursday, June 5, 2031 11:58 UTC
Last quarter Thursday, June 12, 2031 02:20 UTC
New moon Thursday, June 19, 2031 22:24 UTC
First quarter Saturday, June 28, 2031 00:18 UTC

July

Full moon Friday, July 4, 2031 19:01 UTC
Last quarter Friday, July 11, 2031 11:49 UTC
New moon Saturday, July 19, 2031 13:40 UTC
First quarter Sunday, July 27, 2031 10:34 UTC

August

Full moon Sunday, August 3, 2031 01:45 UTC
Last quarter Sunday, August 10, 2031 00:23 UTC
New moon Monday, August 18, 2031 04:32 UTC
First quarter Monday, August 25, 2031 18:39 UTC

September

Full moon Monday, September 1, 2031 09:20 UTC
Last quarter Monday, September 8, 2031 16:14 UTC
New moon Tuesday, September 16, 2031 18:46 UTC
First quarter Wednesday, September 24, 2031 01:19 UTC
Full moon Tuesday, September 30, 2031 18:57 UTC

October

Last quarter Wednesday, October 8, 2031 10:50 UTC
New moon Thursday, October 16, 2031 08:20 UTC
First quarter Thursday, October 23, 2031 07:36 UTC
Full moon Thursday, October 30, 2031 07:32 UTC

November

Last quarter Friday, November 7, 2031 07:02 UTC
New moon Friday, November 14, 2031 21:09 UTC
First quarter Friday, November 21, 2031 14:44 UTC
Full moon Friday, November 28, 2031 23:18 UTC

December

Last quarter Sunday, December 7, 2031 03:19 UTC
New moon Sunday, December 14, 2031 09:05 UTC
First quarter Sunday, December 21, 2031 00:00 UTC
Full moon Sunday, December 28, 2031 17:32 UTC

Moon phases are global astronomical instants. This calendar uses UTC throughout, without daylight-saving changes. Convert the listed time to your local time zone; your local calendar date may differ.

Understanding Moon phases

The four primary phases at a glance

A complete phase cycle lasts about 29.5 days on average. The changing shape is caused by the relative positions of the Sun, Earth and Moon, not by Earth’s shadow, which is relevant only during a lunar eclipse.

New moon

The Moon is approximately between Earth and the Sun, so its illuminated side is barely visible from Earth.

First quarter

About a week after new moon, half of the visible lunar disc is illuminated and continues to wax.

Full moon

Earth is approximately between the Sun and the Moon, and the Earth-facing side appears fully illuminated.

Last quarter

About a week after full moon, half of the visible disc is illuminated again and continues to wane.

← Back to the calendar overview Calculate Moon phases