I have a spreadsheet containing Sheets for each month of the year, Jan-09 through Apr-09 (this month). Each sheet contains large amounts of data - some of which is based off of a formula ( =H11-Mar-09!H11 ) for example.

It is very awkward to create entirely new formulas each month - is there a way to automatically update the formula upon insertion of a new sheet? We make sure that the sheet containing the most recent month's data is listed first, followed by previous months in order.

A non-VBA solution is preferred, but VBA may be used as a last resort.