Microsoft Excel handles dates as numbers, even though they display as dates -- for example, the date "10/10/2011" is really stored as "40826." This makes it difficult to directly add or subtract years ...

If you use Excel 40 hours a week (and those are the weeks you are on vacation), welcome to the MrExcel channel. Home to 2,400 free Excel tutorials. Bill "MrExcel" Jelen is the author of 67 books about ...