You could have a look at iCalDAVMerge which I made for this purpose: http://www.demon.cx/icaldavmerge/ Another possible method is given here: <http://www.nabble.com/Re%3A-ics-feed-from-CALDAV-p15577170.html> This is good for subscribing to your own calendar with an older client for instance. However to subscribe to other peoples calendars, you would need to know their passwords.
I'm trying to figure out exactly what is meant by monolithic calendar subscriptions. CalendarServer works like a charm for all my CalDAV stuff, no complaints. But not all my software supports CalDAV. Near as I can tell from the CalDAV spec, the CalendarServer docs and config files, there's supposed to be a webcal (".ics") subscription feed for all your events. It is meant exactly to give /something/ to those clients that support subscriptions but not CalDAV. If I go to my caldav server ( :8008) in a browser, I see a "webcal" link that results in an error when clicked, and I'm pretty sure I have monolithic calendar feeds enabled in the config.
So my question is: what would be the URL I use for that feed?