This simple function acts as a critical safety net for your workbooks.

Many Microsoft Excel sheets store date and time values. Sometimes the two values appear in the same cell, and sometimes they do not. If you work with dates and/or times, you need a good understanding ...

Block bad data, duplicates, and incorrect dates with these custom rules.

Susan Harkins shows you how to format and unlock input cells in Excel at the same time by assigning a modified style. It’s common to highlight input cells so users know which values to change, and ...