Unfuddle STACK Help
If your calendaring client supports the iCalendar standard (such as Google Calendar, Apple iCal or Mozilla Calendar), then you can subscribe to the milestone listing for your project. This will allow you to see your milestones right in your desktop calendar application.
NOTE: Not all iCalendar clients support the https:// protocol. You may have to change the URL to begin with http:// in order to successfully subscribe to the feed.