The opening hours for any property, structure, site, or other place are the scheduled times when it is available to serve in its designated function. This applies only to usages whose opening hours are variable; for example it would not apply to residences.

Opening hours may vary by day of the week, by season, or by other means, and also indicate whether a site is open or closed on holidays.

The schedule concerns availability for the particular use. It is distinct from a count of visitors or the length of an individual visit, and a place can have different scheduled availability on different dates.