With the Calendar Timeline App for watchOS you'll get a nice overview of the calendar entries within the next seven days – also reminder for today and earlier are supported in one single app.

The app comes with a set of complications – also with a nice big complication for Infograph Modular watchface. There you'll see all events and reminder of the day and got the next one display above. This complication supports up to 6 calendars at the same time.