Each and every booking calendar instance inherits global options aka Booxter Options. Be it month names, currency, money format, colors – anything. These are the settings applied globally and can’t be changed per single calendar instance.
Booking calendar instances do have a certain degree of independency, however these will be discussed latter, as a part of another topic.
Every option under Booxter Options comes with the help text and is pretty much clear what it does.
But still, a special word of warning is needed for one of these options which is named “Date Format“. It is really important to set it up only once and never change – unless there are no booking calendars attached to any of your posts, pages, custom post types or custom templates. Why? Date format has to be consistent due to the fact that many operations, computations and comparisons rely on it.