I’ve done most of the things listed.
Required 12 weeks of square dancing (8 weeks), waltzing and polka for sophomore and jr year (9 grade was in a different school). Also one swimming unit was required for all students 7-12 grade per year, even if you were on swim team. Having to take swimming sucked because some of the other units were really fun - bowling, curling, archery, golf.
Home Ec for girls in grades 7-9, industrial arts for boys. My brother is 3 years younger and by then they’d split them 50/50. But senior boys in hs took Bachelor’s survival and they all loved it.
No snow days. Okay, we had TWO in 10 years. In Wisconsin. Sometimes the kids who lived on the farms around town couldn’t get into town for school so they had more. And a few times we went home 2 hours early, but once they started cooking lunch, we stayed in school until lunch was over, about 1 pm.
Cursive? Yes (but my kids also had that)
Public school prayers? Yep, also in Massachusetts. Pictures of the Pope and JFK in the classroom, side by side.
Could go home for lunch at the Catholic school, but I never did. Instead, because I was a ‘good student’, I got to eat in the classroom with a few other ‘good kids’ and scrub the black heel marks off the floor with paste wax. ON OUR HANDS AND KNEES! Why was this acceptable to us? Because otherwise you had to go outside for lunch recess and it was Wisconsin, often below zero, and girls wore dresses!
9th grade we took typing for a year. 20 manual typewriters, 20 IBM selectrics. Have to say, I won the chocolate bunny for speed and accuracy, and I was on a manual at the time. I used those skills in college where I typed forms on a manual for Interlibrary loan requests.
My kids went to catholic school for grades k-5 and they said prayers and the pledge every day. They had a former marine as a p.e. teachers and they ran every class. If you didn’t run, you couldn’t play the game (basketball, volleyball, etc) for that day. They learned cursive. Dance was required for 8th graders for their graduation. Kids who lived in the neighborhood could walk home (but not for lunch as it wasn’t long enough). Typing became another ‘special’ in the rotation, and was called ‘keyboarding.’
So I don’t think that much changed for them. Oh, except the snow days. They had a lot of them because some kids came from 10-15 miles away.