Add to Calendar Links
Available as of Pie Calendar Pro version 1.2.
Pie Calendar Pro v1.2 brings the ability for your website visitors to add events to their own calendars such as Apple and Outlook via .ics files, and online calendars such as Google Calendar and Office365.
Clicking an event reveals the popover and the "Add to Calendar" links appear at the bottom:
By default, the Add to Calendar links will not appear unless you turn them on.
You can control which calendars appear in your popover in your WP Admin panel under Settings > Pie Calendar:
Visitors to your website will see event start/end times adjusted relative to their local time zone, which will also be reflected when they add your event to their calendar.