The Hours of Operation plugin uses an ACF admin interface to allow a user to enter opening hours for multiple facilities, a second set of alternate hours, and holiday hours.
These hours are then picked up by the plugin and displayed on the front end in an interactive user interface. The user can move forward and backward one week at a time. The interface makes an admin ajax call to the WordPress backend to fetch the data for the date that the user has selected and then repopulates the frontend.
Though no longer hosted, the code can be seen on my GitHub.