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 ...

Excel functions are the building blocks; formulas are how you bring them to life. Here's the breakdown.

All businesses need to calculate dates and times for payroll, expenses, inventory and more. We show how Excel turns dates into serial numbers for easier calculations, and we discuss Networkdays ...

By default, Excel for the PC uses the 1900 date system, while its Mac counterpart uses the 1904 date system. In most cases, users won't notice this subtle difference.

If you have to work with a date stamp in Microsoft Excel that includes date and time, you can use these simple expressions to extract both components, making them easier to work with.

A TechRepublic member wrote for advice on calculating the years, months, and days elapsed between two dates. This tutorial explains the solution provided by TechRepublic contributor Jeff Davis.