Any idea how I can include simple event information without using an event plugin?
I’m not sure I fully understand your requirements, could you try to explain them a bit further please?
There are some event plugins, like Eventmanager and so one. I need only a calendar view with link to a specific post with the detailedevent data. Some example on the site: countrydancers-toggenburg.ch. There you see a calendar with red dates, marked as events.
There are calendar libraries or script out there, but you will have to implement them manually.
WP also has a simple calendar widget, but it can only display links to posts by published date.