Autumn Equinox

[PeteC]

Arrives in about 4 hours London time. It's called the Spring Equinox in the southern hemisphere.

"In 2014, the September equinox falls on September 23 at 2:29 UTC. Although it happens at the same moment worldwide, the clock times vary by time zone. In the United States, the equinox will occur on September 22 at 10:29 p.m. EDT, 9:29 p.m. CDT, 8:29 p.m. MDT or 7:29 p.m. PDT...."

....and here is an explanation of what happens, and a look from space:

http://earthobservatory.nasa.gov/IOTD/v ... 248&src=fb