A calendar platform is provided for creating an event calendar for publication on a website and sharing events between different calendars. A method for creating an online calendar includes creating at least one event post in the calendar and retrieving from a web server a calendar feed corresponding to a second calendar. For each one of the events in the calendar feed, a new event post for the event is created if the event does not match one of the previously created event posts in the calendar. An event category is assigned to the new event post based on settings defined for the calendar feed. An Internet user viewing the calendar can filter the events by category and export selected events to the user's calendar.