/api/calendars/businessday/{scope}/{code}
IsBusinessDateTime
A Business DateTime is defined as a point in time that:
* Does not represent a day that overlaps with the calendars WeekendMask
* If the calendar is a "Holiday Calendar" Does not overlap with any dates in the calendar
* If the calendar is a "TradingHours Calendar" Does overlap with a date in the calendar
All dates specified must be UTC and the upper bound of a calendar is not inclusive
e.g. From: 2020-12-25-00-00-00
To: 2020-12-26-00-00-00
IsBusinessDay(2020-12-26-00-00-00) == false