Time to Think Spring...Equinox (WIP)

Date

Spring equinox is the day of every year when the length (duration) of the day equals approximately the length (duration) of night. 

For 2018 (for Milton, Delaware):
January 24 - first day > 10 hours daylight
February 21 - first day > 11 hours daylight
March 17 (Spring Equinox) - 12 hours daylight

Search the internet for "How much sunlight do vegetables need" and you'll find a number of pdf's (here's one) about the different requirements of different crops.

The US Navy hosts a website which can provide the duration of daylight for each day based on your location.  Here's the link -  http://aa.usno.navy.mil/data/docs/Dur_OneYear.php