by Todd Main (1 Submission)
Category: Math/Dates
Compatability: Visual Basic 3.0
Difficulty: Beginner
Date Added: Wed 3rd February 2021
Rating: 
(2 Votes)
Counts the number of days between two dates with a choice to include/exclude the number weekend days in the total count. This can be used to calculate items like day-based thresholds.
This can modified (by your own modifications) to exclude specific days like holidays.
Inputs
dtFirstDate
dtSecondDate
fNoWeekend
Code Returns
Integer number of days between two dates.
Side Effects
None known.
VBcodersOption Explicit
Public Sub Test_CountDays()
'Number of Days between now and 10 days ago, excluding all weekend days
MsgBox CountDays(Now - 10, Now, True)
End Sub
Public Function CountDays( _
dtFirstDate As Date, _
dtSecondDate As Date, _
Optional fNoWeekend As Boolean = True _
) As Integer
Dim dtFirstDateTemp As Date 'Hold date to do calculations with
dtFirstDateTemp = dtFirstDate
Dim intWeekendDays As Integer 'Holds weekend days
If dtFirstDate > dtSecondDate Then
Exit Function 'Stops you from messing up this calculation, returns "0"
Else
If fNoWeekend = True Then
Do
If (Weekday(dtFirstDateTemp) Mod 6 = 1) Then
intWeekendDays = intWeekendDays + 1
End If
dtFirstDateTemp = DateAdd("d", 1, dtFirstDateTemp)
Loop Until DateSerial(Year(dtFirstDateTemp), _
Month(dtFirstDateTemp), _
Day(dtFirstDateTemp)) _
= DateSerial(Year(dtSecondDate), _
Month(dtSecondDate), _
Day(dtSecondDate))
CountDays = CInt(DateDiff("d", dtFirstDate, dtSecondDate - intWeekendDays))
Else
CountDays = CInt(DateDiff("d", dtFirstDate, dtSecondDate))
End If
End If
End Function
