1. On your iPhone, open Safari and browse to http://www.townhallseattle.org/calendar.cfm 
2. In the upper right, click Subscribe
3. A new web page opens. Select “Subscribe to iCalendar feed.”
4. Click the blue Subscribe button
5. The iPhone pops up a dialog box. Click Subscribe.
6. Wait for it… no, really, wait…
7. Another iPhone dialog box pops up. “Calendar has been added.”
8. Click “View Events”

Now your iPhone should open the calendar with a list of Town Hall events. To see these events overlaid on your own calendar, in the upper left click Calendars, then click All Calendars.

You can edit or delete your subscribed calendars by opening the iPhone Settings, and selecting Mail, Contacts, Calendars.