Date calculations using or taking account of special
days in the calendar such as holidays.
The Special Dates category is about functions principally
that take into account or calculate holidays.
The Business Days family deals with
incrementing dates so that the date falls on a business
day, as set by BusDaySwitch, such as IsBD, NextBD, and NextDateSeqBD.
The Holidays family has a mix of
functions to determine holidays, either specifically,
like WesternEaster, or
generically, like CreateDate. The list of
national holidays catered for is shown in the List of Holidays.