Because timestamps are represented as serial numbers, you can subtract the earlier time from the later time to get the difference.

When calculating the difference between two dates, you may want to exclude weekends and holidays.

Excel includes a variety of built-in formats that cover general, numeric, currency, percentage, exponential, date, time, and custom numeric formats. You can also design your own custom formats based on one of the built-in formats.

You can greatly reduce data-entry problems in your workbooks by making Excel check entries before entering them in specific cells. To do so, you need to define restrictions and data-validation rules for those cells.

By default, the number of Undo levels in Excel 2016 is 100. You can increase or decrease this number if it's necessary.

Excel's ability to create automatic subtotals is a handy feature that can save you a great deal of time.

In addition to manual data filtering, Excel enables fully automated filtering based on data from the specified range of cells. Before you can use the advanced filtering feature, you must set up a criteria range. A criteria range is a designated range on a worksheet that conforms to specific requirements.

If you would like to understand better how some of these complex array formulas work, consider using a handy tool - Formula Evaluator:

When you first start most of the Office 2016 applications, you'll see a new feature called the Start screen.

You can easily count the number of unique values of the range using a simple formula.