DATEVALUE is a Date and Time function, and its purpose is to convert a date in the form of text to a serial number. In this post, we will show you how to use the DATEVALUE function in Microsoft Excel.

DATEDIF(), which means Date + Dif, is a compatibility function left over from Lotus 1-2-3 that Microsoft adopted in Excel version 2000, which is the only version that explains how this function works.

Subtraction is the easiest way to count days between two dates in Excel. You can use the arithmetic operator – (minus sign) to subtract one date from another to find the number of days between them.