My dd's school is terrible for this, every term there is a class assembly that we are all expected to go to. They have a celebration afternoon where we have to go an look at their work. I don't work so I try to go to everything. The one thing I didn't go to my dd remembers to this day!
One time one of my dd's friends burst into tears because her Mum wasn't there :(
Now we have to go to a picnic lunch before sports day, so again there will be lots of children whose parents work that will be feeling left out.
And got a letter today about a celebration afternoon and cream tea that we are invited to.
I have a younger dd who is 2 and quite naughty and on several occasions the letters have said no younger siblings to attend due to H&S!
Honestly I think that school assume that no parents work during the day!