People rarely schedule working time. And when they do it’s viewed as second-tier time. It’s interruptible. Meetings trump working time. Why? And why so often are the same people who assign deadlines the same ones reassigning all of your time? Crazymaking. They should be securing work time for you and protecting it fiercely.
Why are you letting other people put things on your calendar? The idea of a calendar as a public fire hydrant for colleagues to mark is ludicrous. The time displayed on your calendar belongs to you, not to them. It’s been allocated to you to complete tasks. Why are you taking time away from your coding project to go to a meeting that someone you barely know added you to without asking and without the decency to have submitted an agenda?