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

Using three Microsoft Excel functions, you can easily parse time components from a full date value.

Excel DATEVALUE is a Date and time function, and its purpose is to converts a date in the form of text to a serial number. Learn how to use it.

DATEDIF(), which means Date + Dif, is a compatibility function left over from Lotus 1-2-3 that Microsoft adopted in Excel version 2000. It's fallen off current Excel menus, but you can still use ...

The NETWORKDAYS function in Microsoft Excel is a date and time function that returns the number of whole working days between Start_date and End_date. The NETWORKDAYS function excludes weekends ...

When you enter a date string, Excel formats it as a date using the date format, d-mmm-yy. Figure A The date is an integer; time is a decimal value. A day equals 24 hours.

How to Auto-Format the Date in MS Excel. When you create Microsoft Excel spreadsheets that contain one or more columns of dates, you can make things a bit easier if you pre-format your cells to ...