We have a bi-lingual (Greek and English - WPML) Wordpress events site that uses the default Wordpress Post Calendar widget. We need to customize the widget so that it only displays posts from specific categories. For example, we have 3 post categories: Event, Gallery and News. The Calendar widget should ONLY show posts from the Event category.
Each post represents an 'Event', however, some events run for more than 1 day, so we also need to show this in the event calendar. For example, we have an event post with a publish date of 23 September, and this event is also taking place on 24, 25 and 26 September, we need all 4 dates to show on the calendar, but when clicking on any of the 4 dates it takes the user to the same post.