Have tried to add the Dutch holidays calendar to my outlook.com agenda. I deleted it inadvertently.

I used these steps: http://windows.microsoft.com/nl-nl/windows/outlook/calendar-holiday-other    and am give the folowing url to subscribe to:
webcals://calendar.calendar.live.com/calendar/Nederlandse feestdagen/calendar.ics

Then I get an error message saying the URL is not correct.

What is the right URL?

Thanks!