Visitors are able to add the events to local calendars: Google, Yahoo, iCalendar, Outlook.
In order to activate Add to... feature:
Go to the Wix Editor page.
Double click on the Calendar to open the Settings.
Go to the Advanced tab.
From Advanced Settings.
Activate the Add to...Button toggle button.
After clicking on the icons and inserting the info needed, the event will be added to your local calendar.