ical is effectively this: https://en.wikipedia.org/wiki/ICalendar https://en.wikipedia.org/wiki/ICalendar. Google Calendar for example will let you follow publ

ical is effectively this: https://en.wikipedia.org/wiki/ICalendar https://en.wikipedia.org/wiki/ICalendar. Google Calendar for example will let you follow published external calendars by URL: https://calendar.google.com/calendar/u/0/r/settings/addbyurl https://calendar.google.com/calendar/u/0/r/settings/addbyurl. So yes, the technology base exists. There's other active uses of it here and there, e.g. many services send event emails with ics files attached, containing a single-event calendar that some mail clients (including gmail) will show/import automatically. To date it hasn't really become popular as an RSS-style tool though - from what I've seen it's largely used directly within your own calendar, rather than as a browseable list of upcoming events from many sources.