Well, a picture tells a thousand words, doesn't it? So, you want to start a new calendar year then, is it? How was your calendar created? Do you have a VBA routine do it for you? Via formulas? By hand? I have a hankering you're not just wanting to change the sheet names, are you? Unless you have a formula based system that looks at the sheet name (month & year) and populates accordingly... but I doubt it's that sophisticated. So, before we go any further and waste any of yours, mine, or anyone else's time, can you please describe for us in great detail what it is you are wanting to achieve here overall?