ElapsedTime

Function ElapsedTime( _
    endTime As Date, _
    startTime As Date _
) As String
    Dim Interval As Date
    ' Calculate the time interval.
    Interval = endTime - startTime
    ' Format and print the time interval in 
    ' days, hours, minutes and seconds.
    ElapsedTime = _
        Int( _
            CSng( _
                Interval _
            ) _
        ) & _
        " days " & _
        Format( _
            Interval, _
            "hh" _
        ) & _
        " Hours " & _
        Format( _
            Interval, _
            "nn" _
        ) & _
        " Minutes " & _
        Format( _
            Interval, _
            "ss" _
        ) & _
        " Seconds"
End Function

This has been adapted from https://docs.microsoft.com/en-us/office/vba/access/concepts/date-time/calculate-elapsed-time