In primary school it was almost a given that they scheduled things in the school day which is understandable but a bit sad that when i was teaching myself, i couldn't get time off for sports day etc.
In secondary school I was chatying to a mum friend who was asked to go to a meeting during school time. She can't...she works! Not a huge issue i guess and not sure how it can be solved. As an ex teacher I wouldn't have wanted to meet parents outside school hours.