The code below will add the month to the sheet name. On row 5 you will find on example of excluding a sheet. You can add to this row to exclude more sheets or you can remove the row (as well as row 7) if you don't want to exclude any sheet.
Dim ws As Worksheet
For Each ws In Worksheets
If ws.Name <> "Master" Then
ws.Name = ws.Name & "-" & Format(Date, "Mmmm")