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.

As you create Excel spreadsheets for your small business, time and date functions frequently add both convenience and programming capability to your workbooks. There's good news with date functions.

The EOMONTH function in Microsoft Excel returns the last day of a month in the past, the current month, or a month in the future. Whether you need to calculate end-of-month due dates, deadlines, ...