Is there a formula or a way to input the last date a file was modified into
a cell? I have a spreadsheet that many users will be accessing but will not
be able to change. I want them to be able to see the last time the
information was updated. I could manually type in the date, but I know I
may forget sometime, so I want a cell that show the last modified date
automatically. Is this possible or am I crazy?

thanks for your help.