<p> 1. Switch to the Calendar view in the Zimbra webui.<br /> 2. Click &#8220;New Calendar&#8221; (or &#8220;Ny kalender&#8221; in Norwegian).<br /> 3. Name it something nice like &#8220;Norwegian public holidays&#8221;.<br /> 4. Check the box &#8220;Synchronize events from remote calendar&#8221; (&#8220;Synkroniser avtaler mot ekstern kalender&#8221; in Norwegian).<br /> 5. Paste <a href="http://ical.mac.com/bjorkheim/Norske%20helligdager.ics">http://ical.mac.com/bjorkheim/Norske%20helligdager.ics</a><br /> 6. Click Ok. </p> <p> As long as the calendar maintainer bothers to update, Zimbra wil automatically receive updates.