I need to represent opening hours, and a method which returns true/false for a certain day and time.
Is there any package which has this functionality already?

Edit: Basically I would need to construct an object with data out of db or a file, then perform a basic check against the object, like if it's closed at a certain moment.

The problem was that some businesses will have working hours after 00:00 so it overlaps the next day.
In this case I figure out that the object should be able to support multiple time frames per day, also to cover lunch brakes.