2018 Autumnal (Fall) Equinox In New Hampshire Will Be On Saturday, September 22, 9:54pm (Eastern).
Click pictures to ENLARGE.
Attribution WILL be enforced.
Note that daylight is NOT exactly 12 hours!
If anything we get closer to 12 hours 3 days later.
There is a reason for that. It is our latitude above the equator.
If we were closer to the equator it would have been closer to 12 hours.
See this explanation in Time-and-Date.