Sunset is 4:39PM right now in Fort Collins. Night is after sunset in common English: https://ell.stackexchange.com/questions/8954/the-exact-time-of-evening-and

Sunset is 4:39PM right now in Fort Collins. Night is after sunset in common English: https://ell.stackexchange.com/questions/8954/the-exact-time-of-evening-and-night https://ell.stackexchange.com/questions/8954/the-exact-time-... Also for the FAA: 14 CFR § 1.1: "Night means the time between the end of evening civil twilight and the beginning of morning civil twilight, as published in the Air Almanac, converted to local time."