We are re-designing several internal parts of our playback engine that will make this feature possible towards early 2020. Stay tuned!
One way to do this would be to use the Richtext Widget and paste your HTML. Right now, it is not so easy to do, but eventually it will be. Also, we do plan to provide some templates for fixed layouts (HTML templates) which you will be able to edit within the Widget. One of them could be a scheduling template.
Perhaps this is more close to the scheduling concept? Waiting for your feedback to dig in.
Showing calendar information is a frequently requested feature. We are planning to support ICS calendars with a Widget.
In the mean time, check out this article on how you can get a Google Calendar shown on a Yodeck screen: https://www.yodeck.com/news/how-to-get-your-google-calendar-on-a-wall-mounted-screen/