Shape of colored background for events in calendar gadget
Rob L commented
We don't see this on our website. The colored background of each event have rounded corners with padding around the text, regardless of which month it is. I just checked our CSS customization, and I don't see anything in there that seems relevant, so I don't think we did anything special here.
Feel free to check out how our calendar looks: https://www.jsts.us/Ride-Calendar