Where are the reference manuals for Excel 2008? I have a 2008 copy of Excel that I use to proof the occasional Excel file I need to email.  When I click on the help menu item I am directed to a Microsoft advertisement.  Where are the help files or manuals?
Here's the What's New page for Excel: https://support.office.com/en-us/excel.  You'll find Mac toward the bottom.  Once you're at the SOC site you can search for specific questions, like "format dates".