First Day of Fall

September brings fall in the Northern Hemisphere - Magstefan, Stock Xchng

The astronomical start of the fall season is marked by the positions of Earth and the sun.

September brings the last day of summer and the first day of fall. Here is a list of the precise moments and dates when fall arrives for the northern hemisphere:

• September 23, 2007 at 5:51 am EDT
• September 22, 2008 at 11:44 am EDT
• September 22, 2009 at 5:18 pm EDT
• September 22, 2010 at 11:09 pm EDT
• September 23, 2011 at 5:04 am EDT
• September 22, 2012 at 10:49 am EDT

The September Equinox

On the equinox, the sun rises directly in the east and sets directly in the west. This is true for both the fall and spring equinoxes. So on two days of the year you can find the exact cardinal directions of East and West by using the sun. The ancients did this when they set up their calendars at Stonehenge and the Mayan pyramid, among others.

Read more: First Day of Fall: Autumn Begins with the September Equinox http://www.suite101.com/content/first-day-of-fall-a30039#ixzz0yxsIzPHm