We show you how to use Excel to count days between two dates using the DAYS, DATEDIF, NETWORKDAYS, and TODAY functions, and Subtraction.

DATEDIF(), which means Date + Dif, is a compatibility function left over from Lotus 1-2-3 that Microsoft adopted in Excel version 2000. It's fallen off current Excel menus, but you can still use ...

As part of key combos in Word, Excel, and Outlook, they make it easier and faster to perform commonly used commands. Here are 15 of the most essential function-key strokes.