| North Hemisphere |
Range |
South Hemisphere |
Range |
| Spring |
March 1- May 31 |
Spring |
Sept 1-Nov 30 |
| Summer |
Jun 1- Aug 31 |
Summer |
Dec 1-Feb 28 |
| Fall |
Sept 1- Nov 30 |
Fall |
March 1-May 30 |
| Winter |
Dec 1- Feb 28 |
Winter |
Jun 1-Aug 31 |