I have an Excel 2003 workbook with worksheet tabs named after the months of
the year (Jan, Feb, Mar, Apr,...) for 2009 and 2008. Each worksheet contains
information about the activities for that month (Sales, attendance, new
students, etc...). I wanted to create a Summary worksheet that summarizes
each activity by year (2009 Sales, attendance, new students, etc...). I want
to automatically update the Summary worksheet as new tabs are added without
copying and pasting the new tabs (like 2010 information). Anyone have any
ideas how I can do this?

Summary:
2010
Jan
Feb
Mar

2009
Jan
Feb
Mar

2008
Jan
Feb
Mar