VBA Convert date to week number

Question

In VBA I want to convert a date as 03/11/2017(DD/MM/YYYY) into the week number for that date.

Until now I have the following code:

   \'geting the d         


        

Answer 1

Calculate ISO year using datepart with bugs workaround:

'Test 2007-12-31 should return W01Y2008

myDate = "2007-12-31"

ISOWeek = DatePart("ww", myDate, vbMonday, vbFirstFourDays)
Week1 = DatePart("ww", myDate, vbMonday, vbFirstFourDays)
Week2 = DatePart("ww", DateAdd("d", 7, myDate), vbMonday, vbFirstFourDays)
ISOYear = DatePart("yyyy", myDate, vbMonday, vbFirstFourDays)
Year1 = DatePart("yyyy", myDate, vbMonday, vbFirstFourDays)
Year2 = DatePart("yyyy", DateAdd("d", 7, myDate), vbMonday, vbFirstFourDays)

If ISOWeek = 53 And DatePart("ww", DateAdd("d", 7, myDate), vbMonday, vbFirstFourDays) = 2 Then
   ISOWeek = 1
End If

if ISOWeek = 1 And DatePart("yyyy", DateAdd("d", 7, myDate), vbMonday, vbFirstFourDays) > ISOYear Then
 ISOYear = ISOYear + 1
End If

MsgBox("W" & ISOWeek & "Y" & ISOYear)

' Result in W01Y2008