You should be able to get 01 to appear on the sheet name tab, but when referring to it in code you would have to use Sheets("01"), with the numeric digits enclosed in quote marks. While the tab name appears as numbers, it is a string data type and all string data will generally need quote marks when used in code, unless you put them in variables. Variables do not use quote marks, but may represent data which does use quote marks. The bit about the variables is just additional info, not to be confused with the explanation of using the 01 in code.