Microsoft Excel's Month and Weekday functions output numeric values for a given date. The Month function results in the month numbers, such as "3" for March or "12" for December.

Formulas are powerful tools for performing calculations and analyzing data in Excel. In this beginner’s guide, you’ll learn how to use formulas and explore some popular built-in functions.

Excel for the web now supports conditional formatting, and the interface is easier to use than the desktop edition. Susan Harkins shows you how to use it.