Another word for day
The period of the earth's revolution
twenty-four hours, mean solar day, sidereal day, time between sunrise and sunset, period from dawn to dark, solar day, nautical day, natural day, civil day, astronomical day, diurnal course, date.
The time of light or work
daylight, daytime, broad daylight, full day, workday, working day, daylight hours, broadcast day, eight-hour day, union day; good, bad, hot, cold, damp, etc., day; sizzler*, scorcher*, good day for the races*.
A special day
A period of time