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days in the week

days in the week

days in the week

Does anyone have a routine to calculate the number of Thursdays(or any other day) between two dates.

RE: days in the week

Here is a function that should do what you ask;


' Procedure : finddays
' Author    : mellon
' Date      : 21-Aug-2016
' Purpose   : This routine will return a count of the number of selected weekday (EG Thursdays)
' bewteen 2 dates.
'Date1 ----the starting date of the time interval
'Date2 ---- the endinig date of the time interval
'WhichDay-- integer representing a Day where 1=Sun,2=Mon,3=Tue,4=Wed,5=Thur,6=Fri,7=Sat
'Showdebug --if True will display the dates that are Whichday between Date1 and Date2
'             in the immediate window
Function finddays(StartDate As Date, enddate As Date, WhichDay As Integer, _
                  Optional Showdebug = False) As Integer

    Dim tmpDate As Date
    Dim NumDaysChosen As Integer
10        On Error GoTo finddays_Error

20    tmpDate = StartDate
30        Do While tmpDate <= enddate
40      tmpDate = tmpDate + 1
50      If WeekDay(tmpDate) = WhichDay Then
60          If Showdebug Then Debug.Print tmpDate
70          NumDaysChosen = NumDaysChosen + 1
80      Else
90      End If
100     i = i + 1
110       Loop
120       finddays = NumDaysChosen

130       On Error GoTo 0
140       Exit Function


150       MsgBox "Error " & err.number & " in line " & Erl & " (" & err.Description & ") in procedure finddays of Module DateCalcs_UA"
End Function 

Test routine using 7 (Saturday)


Sub testDindDays()
Dim date1 As Date: date1 = #2/23/2016#
Dim date2 As Date: date2 = #10/27/2016#
Dim dayChosen As Integer: dayChosen = 7 'where Sun = 1, Mon = 2......Sat = 7
Dim TotDays As Integer
TotDays = finddays(date1, date2, dayChosen, True)
Debug.Print "Number of Saturdays between " & date1 & " and " & date2 & " is " & TotDays
End Sub 

RE: days in the week

Or the slightly shorter:


Public Function GetSpecificDayCount(StartDate As Date, EndDate As Date, SpecificDay As VbDayOfWeek) As Long
    GetSpecificDayCount = DateDiff("ww", StartDate, EndDate, SpecificDay)
End Function 

RE: days in the week

Thanks chaps.
Sorted by loops and datediff functions

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