Fall equinox occurs today at 04:49HST. Today there will be little difference between the length of the night compared to number of daylight hours. This is the first day of fall as marked by many cultures in the northern hemisphere.
2012 Solstices and Equinoxes
UT | HST | |||
Perihelion | Jan 5 | 03:59UT | Jan 4 | 17:59HST |
Spring Equinox | Mar 20 | 05:14UT | Mar 19 | 19:14HST |
Summer Solstice | Jun 20 | 23:09UT | Jun 20 | 13:09HST |
Apehelion | Jul 4 | 23:59UT | Jul 4 | 13:59HST |
Fall Equinox | Sep 22 | 14:49UT | Sep 22 | 04:49HST |
Winter Solstice | Dec 21 | 11:12UT | Dec 21 | 01:12HST |
Source: USNO Data Services Website and the NASA Sky Calendar |