MrpCalendar represents a calendar in the project. A calendar contains the information on working/nonworking time for resources. A calendar has a default week, specifying the day types (#MrpDay) used for each day of the week by default. Day types can be overriden so that a working day has another set of working time intervals per calendar. Certain dates can be overridden to use another day type as well. A private struct for internal use only. The definition of this structure is not publically available. Object representing a calendar in the project. @mrpcalendar: the object which received the signal. Represents a time interval. @name: @project: @Returns: @name: @calendar: @Returns: @name: @parent: @Returns: @new_parent: @child: @calendar: @calendar: @Returns: @calendar: @name: @calendar: @day: @intervals: @calendar: @day: @check_ancestors: @Returns: @calendar: @day: @Returns: @calendar: @date: @check_ancestors: @Returns: @time: @calendar: @week_day: @Returns: @time: @calendar: @week_day: @Varargs: @calendar: @date: @Varargs: @calendar: @Returns: @calendar: @Returns: @start: @end: @Returns: @interval: @Returns: @interval: @Returns: @interval: @interval: @offset: @start: @end: