Built-in Constants

VBA.vbDateTimeFormat

This enumeration is used with the FORMATDATETIME

VBA.vbDayOfWeek

This enumeration is used with the DATEDIFF, DATEPART, FORMAT, WEEKDAY and WEEKDAYNAME

VBA.vbFirstWeekOfYear

This enumeration is used with the DATEDIFF, DATEPART and FORMAT

VBA.Calendar

There is a property that can be used to change the calendar type.