Looks like you have Fixed schedules for which that could be useful, especially if you only have a few schedules. I have both Fixed and Flex and the Fixed show up as blue drops and the Flex show as green drops. Days that have both types running I see and half blue half green drop.
The calendar view isn’t very useful for Flex Daily schedules with multiple zones. I have a few of those and rarely does it run all at once. So my schedule may run every day but each zone only waters every 3 or 4 days. I’ve found when I want to know when a zone last ran and will next run I use the main screen that lists both of those per zone.