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Application.DateDifference Method (Project)

office 365 dev account|Last Updated: 6/12/2017
1 Contributor

Returns the duration between two dates in minutes, for an automatically scheduled task.


expression. DateDifference( ** StartDate, ** FinishDate, ** Calendar** )

expression A variable that represents an Application object.


NameRequired/OptionalData TypeDescription
StartDateRequiredVariantThe date used as the beginning of the duration.
FinishDateRequiredVariantThe date used as the end of the duration.
CalendarOptionalObjectA resource or task base calendar object. The default value is the calendar of the active project.

Return Value



To get a difference between two dates for a manually scheduled task, which uses an effective calendar that can include non-working time, use the EffectiveDateDifference property.


The following example displays the duration of a task that begins on 7/11/97 at 8 A.M. and ends on 7/13/97 at 5:00 P.M.

Sub FindDuration() 
 MsgBox Application.DateDifference ("7/11/97 8:00 AM", "7/13/97 5:00 PM") 
End Sub
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