iCalendar refresh via cronjob

[Leon de Graaff]

The the events backend under iCalendar there is a nice button that triggers the refresh/new import for new events from a ical file. 
I've checked but the link produced is locked to a user. So I can't trigger it with a simple old fashioned crondjob. 
Is there a way to do this without the user locked key? 

There is Zapier, but we don't want to use that. Why? Because it's another service we need to keep up and we have everything we need to do it ourselves. 

Cronjob is also being used for the tasks, so why not just add this in as well? 

[Jim M]

These should automatically refresh via the system. Is there a reason why you're attempting to do this?

[Leon de Graaff]

What would be the update rate? Because I tried and it looks like events where'd imported after initial import. 

[Leon de Graaff]

Ok, scratch this, it took a while, but it synced. Still wondering what triggers the sync. 

[Jim M]

There's a background task which runs every 4 hours to update iCalender feeds.