9:10 pm – 9:40 pm
when conditions allow, i.e. when temps are >50°F, Dew Point >45°F, Heating Degree Days <9, atmosphere stable, no pressure drops, no strong wind, no rain in the area.
Chance of a good flight if conditions stable, but likely considerably after dark

Sunset: 8:26 pm
Dark: 8:56 pm (10-20 minutes earlier if cloudy)
Sunrise: 6:30 am