The word holiday comes from the Old English word hāligdæg (hālig "holy" + dæg "day").^[2] The word originally referred only to special religious days.

The word holiday has differing connotations in different regions. In the United States the word is used exclusively to refer to the nationally, religiously or culturally observed day(s) of rest or celebration, or the events themselves, whereas in the United Kingdom and other Commonwealth nations, the word may refer to the period of time where leave from one's duties has been agreed, and is used as a synonym to the US preferred vacation. This time is usually set aside for rest, travel or the participation in recreational activities, with entire industries targeted to coincide or enhance these experiences. The days of leave may not coincide with any specific customs or laws. Employers and educational institutes may designate ‘holidays’ themselves which may or may not overlap nationally or culturally relevant dates, which again comes under this connotation, but it is the first implication detailed that this article is concerned with. The modern use varies geographically. In North America, it means any dedicated day or period of celebration. In the United Kingdom, Australia and New Zealand, holiday is often used instead of the word vacation