How to count periods of absence in excel

Jack_Roberts 

Here is a custom VBA function that you can use:

Function Periods(daterange As Range, coderange As Range, code As String)
    Dim i As Long
    Dim f As Boolean
    For i = 1 To daterange.Count
        If Weekday(daterange(i).Value, vbMonday) <= 5 Then
            If coderange(i).Value = code Then
                If Not f Then
                    Periods = Periods + 1
                    f = True
                End If
            Else
                f = False
            End If
        End If
    Next i
End Function

In CC3, enter the formula

=Periods($B$9:$B$42,CC9:CC42,"S")

Adjust the ranges as needed, then fill to the right.

Don't forget to save the workbook as a macro-enabled workbook and to allow macros when you open the workbook.