period, period of time, time period - an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"

day - a day assigned to a particular purpose or observance; "Mother's Day"

date - the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred; "he tried to memorizes all the dates for his history class"

day of the week - any one of the seven days in a week

hebdomad, week - any period of seven consecutive days; "it rained for a week"