ICAL
ICAL (short for iCalendar) is a standard calendar format that allows you to
transfer events from one calendar to another via an .ics file format. An
.ics file can have a single event or a list of events. You can download the
.ics file and import it into your calendar for a snapshot of the data or
you can subscribe and let your calendar program update the event data in
your calendar automatically.
CSV
CSV (short for "comma-separated values") is a simple data format that many
programs, such as Microsoft Excel, use for importing and exporting data.
You can import a list of events into Microsoft Outlook, Yahoo! Calendar,
and other tools by using this CSV file.
RSS
RSS is a regularly updated summary of events that can be viewed through an
RSS reader, along with links to full versions of events. When you subscribe
to an RSS feed of events, you'll receive a summary of new events through
your RSS reader. When you click on an RSS button, your browser may display
a page of web code; if this happens, review your reader's documentation
on how to subscribe to an RSS feed.
RSS readers are as numerous as the stars on a clear night during a concert
at the park. To find a reader, try Google or ask your friends what they
use.