[agenciawebsites]

You can use Calendarize it or My Calendar by Joseph C Dolson.

Calendar for Current Logged in User ( calendarize it)

[calendarizeit author=”current_user” personal_calendar_message=”Sorry, but you need to login in order to view your personal calendar”]

In My Calendar you generate a shortcode like that too.

In my case neither of plugins worked because i need that works for the groups too..