Option Explicit
Private Sub Workbook_Open()
'lock sheets if necessary
LockAll
End Sub
Private Sub LockAll()
Dim wsWS As Worksheet
Dim rDate As Range
Dim dtNow As Date
Dim vMonths As Variant
Dim iDay As Integer, iMonth As Integer, iWBYear As Integer, lR As Long
Dim bProtect As Boolean
Dim sMonth As String
Const sPW As String = "MyPassword" '<<<< to be modified >>>>
Const sMONTHS As String = "january,february,march,april,may,june,july,august,september,october,november,december" '<< note: All lower case
'get year for the workbook - assuming it is in Master Sheet in some cell. <<<< Ammend as required >>>>
iWBYear = Sheets("Master Sheet").Range("A1")
'store todays day and month number
iDay = Day(Date)
iMonth = Month(Date)
' make an array with each of the month names
vMonths = Split(sMONTHS, ",")
'loop through each of the sheets
For Each wsWS In Me.Sheets
If Not wsWS.Name Like "Master Sheet" Then
' <<<< there are two options here. Comment out the one not to be used >>>>
'Option 1 - month name on each sheet
' Assumes month is in cell A1 on each sheet. Modify address as required
Set rDate = wsWS.Range("A1") '<<<< modify address to suit >>>>
sMonth = LCase(rDate.Text)
'Option 2 - Month name on the tabs
' alternative: check tab names
sMonth = LCase(wsWS.Name)
'<<<>>>
'now check if the sheet should be locked - after the 8th of the next month
For lR = 0 To 11 'vMonths is an array starting from 0
If Trim(sMonth) Like vMonths(lR) Then
Exit For
End If
Next lR
lR = lR + 1 'lR now has the month number of the sheet
Select Case lR
Case 13
'error, sheet cell A1 does not contain valid month
MsgBox prompt:="Sheet " & wsWS.Name & " does not contain a valid month name in" & vbCrLf & _
rDate.Address & " or as tabname. Please check the sheets so each has the month's name in this cell", _
Title:="Error: Month name not found in sheet"
Case 12
'December - needs to link to next year January
If Date > DateSerial(iWBYear, 1, 7) Then
bProtect = True
End If
Case Else
' all other months
If (iMonth = lR + 1 And iDay > 7) Or iMonth > lR + 1 Then
bProtect = True
End If
End Select
If bProtect Then
wsWS.Protect sPW, _
AllowSorting:=True, _
AllowFiltering:=True, _
AllowUsingPivotTables:=True
bProtect = False
End If
End If
Next wsWS
End Sub