Evening is the period of a day from the end of the afternoon to the beginning of night. The exact times when evening begins and ends depend on location, time of year, and culture, but it is generally regarded as beginning when the Sun is low in the sky and lasting until the end of twilight.

Night or nighttime (also spelled night-time or night time) is the period of ambient darkness from sunset to sunrise during each 24-hour day, when the Sun is below the horizon. The exact time when night begins and ends (equally true with evening) depends on the location and varies throughout the year. When night is considered as a period that follows evening, it is usually considered to start around 8 pm and to last to about 4 am.