New moon dates 2100
- 2100: 13 × new moon — 10 January 2100, 9 February 2100, 11 March 2100, 9 April 2100, 9 May 2100, 8 June 2100, 7 July 2100, 6 August 2100, 4 September 2100, 3 October 2100, 2 November 2100, 1 December 2100, 31 December 2100.
- Next: 10 January 2100.
New moon dates 2100
| Date | Time (UTC) | |
|---|---|---|
| Sun 10 Jan | 12:57 | next |
| Tue 9 Feb | 04:56 | |
| Thu 11 Mar | 22:30 | |
| Fri 9 Apr | 16:18 | |
| Sun 9 May | 08:55 | |
| Tue 8 Jun | 23:33 | |
| Wed 7 Jul | 12:08 | |
| Fri 6 Aug | 23:03 | |
| Sat 4 Sep | 08:51 | |
| Sun 3 Oct | 18:04 | |
| Tue 2 Nov | 03:16 | |
| Wed 1 Dec | 13:02 | |
| Fri 31 Dec | 23:58 |
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.