Bookkeepers, project managers, HR departments and more use the Excel Date & Time functions WEEKNUM, ISOWEEKNUM, WORKDAY, WORKDAY.INTL to calculate time. Here's how.

Excel has over 475 formulas in its Functions Library, but we've selected the most popular, from date and time functions to mathematics and simple data manipulation.

We show you how to use Excel to count days between two dates using the DAYS, DATEDIF, NETWORKDAYS, and TODAY functions, and Subtraction.

With the introduction of new formulas, Excel has become even more powerful, allowing users to tackle complex tasks with ease. In this guide ...

For Excel 365, formulas that return a set of values (or an array) are able to spill. Therefore, you can have your formulas spill when using simple calculations, as we did here, and also when using ...

Learn which Excel formulas perform best for large datasets and how to optimize them for faster calculations and better performance.

The EOMONTH function in Microsoft Excel returns the last day of a month in the past, the current month, or a month in the ...

Use either keyboard shortcuts or the NOW and TODAY functions to display the current date and time in Excel and Google Sheets spreadsheets together.