New moon dates 2021
- 2021: 12 × new moon — 13 January 2021, 11 February 2021, 13 March 2021, 12 April 2021, 11 May 2021, 10 June 2021, 10 July 2021, 8 August 2021, 7 September 2021, 6 October 2021, 4 November 2021, 4 December 2021.
New moon dates 2021
| Date | Time (UTC) | |
|---|---|---|
| Wed 13 Jan | 05:00 | passed |
| Thu 11 Feb | 19:05 | passed |
| Sat 13 Mar | 10:21 | passed |
| Mon 12 Apr | 02:30 | passed |
| Tue 11 May | 18:59 | passed |
| Thu 10 Jun | 10:52 | passed |
| Sat 10 Jul | 01:16 | passed |
| Sun 8 Aug | 13:50 | passed |
| Tue 7 Sep | 00:51 | passed |
| Wed 6 Oct | 11:05 | passed |
| Thu 4 Nov | 21:14 | passed |
| Sat 4 Dec | 07:43 | passed |
Questions people ask
What is a moon day?
A moon day counts the days since the last new moon: the first moon day starts at the new moon, the fifteenth around the full moon. The count on this page is the whole number of days since the last new moon plus one.
Is the moon waxing or waning?
Waxing means the lit part is growing (from new moon to full moon); waning means it is shrinking (from full moon to new moon). In the northern hemisphere a waxing moon is lit on the right.
How are the phase times calculated?
With the algorithms published by Jean Meeus in Astronomical Algorithms (1998), including the periodic terms, which give the phase instants to about one minute.