Many stop lights at street intersections display a countdown of the remaining seconds before the light changes. If you’re like me, you count this time in your head and then check how in sync you are.

In addition to its basic spreadsheet functions, Microsoft Excel also allows writing formulas to perform functions on existing data. Using a quick equation, you can convert an existing set of time data ...

For thousands of years, we’ve divided days into 24 hours, hours into 60 minutes, and minutes into 60 seconds. But why do we have to do that? Here’s the story of the one gloriously failed attempt to ...