Pop-up Excel Calendar is a plug-in to add to MS Excel that lets you activate a window that shows a calendar when you click on cells that contain dates.
The Pop-up Excel Calendar window can be opened automatically or manually. Once opened, you can select any file in the calendar and, once selected, the data remains in that cell. This plug-in is ideal for all those workbooks that need to be modified with different dates.
To be able to add this Pop-up Excel Calendar plug-in you need any of the following versions of MS Excel: 2000, XP, 2003 or 2007.