Calculates the number of (integer) days between two (normalized) dates. For example, if you provide a data 1 Jan 2003 00:01, as the start date and 2 Jan 2003 23:59, as the end date, then the number of days returned will be 1.
the integer number of days between two (normalized) dates
@throws IllegalArgumentException thrown if the start date is strictly prior
to the end date.
AbstractBusinessCalendar Class | WebCab.BusinessCalendar Namespace | Calendar)