January 2013
- Last quarterSat 5 Jan, 03:58
- New moonFri 11 Jan, 19:44
- First quarterFri 18 Jan, 23:45
- Full moonSun 27 Jan, 04:38
Lunar calendar
Moon phases 2013
The lunar calendar for 2013: 12 new moons and 12 full moons, month by month, with a calendar of the Moon’s phase on each day that you can print.
Moon phases 2013 · times in UTC
February 2013
- Last quarterSun 3 Feb, 13:56
- New moonSun 10 Feb, 07:20
- First quarterSun 17 Feb, 20:31
- Full moonMon 25 Feb, 20:26
March 2013
- Last quarterMon 4 Mar, 21:53
- New moonMon 11 Mar, 19:51
- First quarterTue 19 Mar, 17:27
- Full moonWed 27 Mar, 09:27
April 2013
- Last quarterWed 3 Apr, 04:37
- New moonWed 10 Apr, 09:35
- First quarterThu 18 Apr, 12:31
- Full moonThu 25 Apr, 19:57
May 2013
- Last quarterThu 2 May, 11:14
- New moonFri 10 May, 00:29
- First quarterSat 18 May, 04:35
- Full moonSat 25 May, 04:25
- Last quarterFri 31 May, 18:58
June 2013
- New moonSat 8 Jun, 15:56
- First quarterSun 16 Jun, 17:24
- Full moonSun 23 Jun, 11:32
- Last quarterSun 30 Jun, 04:54
July 2013
- New moonMon 8 Jul, 07:14
- First quarterTue 16 Jul, 03:18
- Full moonMon 22 Jul, 18:15
- Last quarterMon 29 Jul, 17:43
August 2013
- New moonTue 6 Aug, 21:51
- First quarterWed 14 Aug, 10:56
- Full moonWed 21 Aug, 01:45
- Last quarterWed 28 Aug, 09:35
September 2013
- New moonThu 5 Sept, 11:36
- First quarterThu 12 Sept, 17:08
- Full moonThu 19 Sept, 11:13
- Last quarterFri 27 Sept, 03:56
October 2013
- New moonSat 5 Oct, 00:35
- First quarterFri 11 Oct, 23:02
- Full moonFri 18 Oct, 23:38
- Last quarterSat 26 Oct, 23:41
November 2013
- New moonSun 3 Nov, 12:50
- First quarterSun 10 Nov, 05:57
- Full moonSun 17 Nov, 15:16
- Last quarterMon 25 Nov, 19:28
December 2013
- New moonTue 3 Dec, 00:22
- First quarterMon 9 Dec, 15:12
- Full moonTue 17 Dec, 09:28
- Last quarterWed 25 Dec, 13:48
Where you are
Moonrise and moonset in your city
The phase is the same everywhere; moonrise and moonset are not. Open the sun and moon page of your city for today’s times and a month of phases.
/
- Type a city, a country or a zone such as “CET” or “Tokyo”.
How it works
The four principal phases
The Moon passes through four principal phases in about 29.5 days: new moon (Moon between Earth and Sun, unlit side towards us), first quarter (half the disc lit, on the right seen from the northern hemisphere), full moon (the whole disc lit) and last quarter (half lit, on the left). The days in between are crescent and gibbous, waxing before full moon and waning after it.
A lunar cycle lasts 29.53 days on average, but individual cycles range from about 29.3 to 29.8 days, so a year holds 12 or 13 of each principal phase, and the days between the four phases are not always the same.
Dates depend on the time zone
Each principal phase is one instant, the same everywhere. The calendar date of that instant depends on the time zone: a new moon at 23:30 UTC is already the next day in Asia and Australia. Use the switch above the calendar to read the dates in UTC or in your own zone; the grids and the lists change together.
The phase drawn for an ordinary day is the Moon at noon, so it is the same for everyone in that time zone. Illuminated percentages are the true lit fraction of the disc.
How we compute it
The principal phases are from Jean Meeus’s Astronomical Algorithms (chapter 49) and agree with the US Naval Observatory’s tables to the minute (checked for 2026 and 2027). The illuminated fraction comes from the Moon’s and Sun’s true positions. The calculation assumes a constant difference between Earth time and UTC and is good for 2000–2050.
Questions
Good to know
What are the moon phases in 2013?
There are 12 new moons, 12 first quarters, 12 full moons and 13 last quarters in 2013. The first new moon is on Friday, 11 January 2013, the first full moon on Sunday, 27 January 2013 (dates in UTC).
How long is the lunar cycle?
The Moon takes 29.53 days on average to go from one new moon to the next, and individual cycles range from about 29.3 to 29.8 days.
Why does the date of a moon phase differ from another calendar?
A principal phase is a single instant, and the date depends on the time zone. Switch the calendar to your own time zone to read the phases in local time.
Can I print the moon phase calendar?
Yes. Use “Print this calendar”: the page prints on white paper in light ink, six months to a page, with the principal phases marked.
Is the Moon’s phase the same everywhere?
Yes, the same fraction of the disc is lit at the same moment everywhere on Earth. Only the date, and how the Moon looks (upside down in the south), differ.