56 Opening Hours Specification
https://w3id.org/class/redaktor/OpeningHoursSpecification
Definition
A structured value providing information about the opening hours of a place or a certain service inside a place.
The place is open if the [[opens]] property is specified, and closed otherwise.
If the value for the [[closes]] property is less than the value for the [[opens]] property then the hour range is assumed to span over the next day.