How to insert & use Functions in Excel Functions help you perform a variety of mathematical operations, lookup values, calculate date and time, and a lot more.

How can I add or subtract months from a date using the EDATE function in Excel? To use the EDATE function you will need the starting date and the number of months to add or subtract.

Excel’s Date & Time functions ease the workload for bookkeepers, project planners, HR departments, and other jobs where time is money. The four functions covered here—ISOWEEKNUM, WEEKNUM ...