The Help on the Excel Edate worksheet function contains an error:.

[Guest]

The Edate worksheet function specifies a startdate and a number of months.
These two values should be separated by a colon ( rather than by a comma
(,), as erroneously stated in all offline and and online Help information

 

[Ron de Bruin]

Hi Guido

This depend on the regional settings of your system.
If I use a Dutch machine I must use ;
And if I use a English machine a ,

You can change it if you want in the regional settings tab on the
Windows control panel.