Astronomical Events

Phases of Moon, Seasons

Current time is: Thursday, November 23 20h25m PDT (Pacific Daylight Time), Friday, November 24 03h25m UTC (Coordinated Universal Time), Friday, November 24 04h25m BST (British Summer Time)

Event Pacific Daylight Time (PDT) Coordinated Universal Time (UTC) British Summer Time (BST)
Last Quarter Moon
13.3 days ago
Friday, November 10
13h36m PDT
Friday, November 10
20h36m UTC
Friday, November 10
21h36m BST
New Moon
5.7 days ago
Saturday, November 18
04h42m PDT
Saturday, November 18
11h42m UTC
Saturday, November 18
12h42m BST
Moon at apogee
(farthest from Earth at 406131 km)
2.4 days ago
Tuesday, November 21
11h53m PDT
Tuesday, November 21
18h53m UTC
Tuesday, November 21
19h53m BST
First Quarter Moon
in 2.6 days
Sunday, November 26
10h03m PDT
Sunday, November 26
17h03m UTC
Sunday, November 26
18h03m BST
Full Moon
in 9.5 days
Sunday, December 03
08h47m PDT
Sunday, December 03
15h47m UTC
Sunday, December 03
16h47m BST
Moon at perigee
(closest to Earth at 357495 km)
in 10.2 days
Monday, December 04
01h43m PDT
Monday, December 04
08h43m UTC
Monday, December 04
09h43m BST
Last Quarter Moon
in 2.3 weeks
Sunday, December 10
00h51m PDT
Sunday, December 10
07h51m UTC
Sunday, December 10
08h51m BST
New Moon
in 3.4 weeks
Sunday, December 17
23h30m PDT
Monday, December 18
06h30m UTC
Monday, December 18
07h30m BST
Moon at apogee
(farthest from Earth at 406604 km)
in 3.6 weeks
Monday, December 18
18h28m PDT
Tuesday, December 19
01h28m UTC
Tuesday, December 19
02h28m BST
December Solstice
in 3.9 weeks
Thursday, December 21
09h28m PDT
Thursday, December 21
16h28m UTC
Thursday, December 21
17h28m BST
First Quarter Moon
in 4.6 weeks
Tuesday, December 26
02h20m PDT
Tuesday, December 26
09h20m UTC
Tuesday, December 26
10h20m BST

It might be that some times are given above in Pacific Daylight Time (PDT) where it would be more appropriate to give the time in Pacific Standard Time (PST). Or vice versa. If this is the case, subtract one hour from the PDT time to get the PST time, or add one hour to go the other direction.

Note: Coordinated Universal Time (UTC) is commonly called Greenwich Mean Time (GMT) although, strictly speaking, this usage is historically and astronomically incorrect.

The "Effective Equinox" is the night that is closest to being 12 hours long, hence "Equi-nox", "Equal Night". This is always before the Astronomical Equinox in the Spring and after the Astronomical Equinox in the Fall. The time given is the time of sunset at the beginning of the Equal Night. The difference in dates is due to atmospheric refraction and the fact that the Sun is not a point source of light. It also varies with latitude.

As an example, for Vancouver in March 2015, on the day of the true Equinox (March 20th), the day is 18 minutes longer than the previous night and 22 minutes longer than the following night. However, on the date of the Effective Equinox (March 17th), the day is four minutes shorter than the previous night and less than a minute longer than the following night.

Occasionally, times for solar eclipses are given above, but in general these will not be seen in Vancouver. Please refer to the Eclipse Web Site at NASA for complete information.

Rob Scharein
Fri 3 Feb 2017 21:03:10 UTC

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