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 ...

Microsoft Excel is incredibly versatile, but there are a lot of functions you might not even know about. These are some of the best ones.

In the example at left, I use the conventional Sum formula to add the hours: =sum (B2:B4). Also, you can save yourself time by accessing Excel’s time-sheet templates, which have all the necessary ...