It started between my son leaving high school in 1997 and my daughter leaving in 2000, cos she had one and he didn't.
When I left Grammar School we had a sixth form dance and all the girls had ball gowns, I had my hair up in ringlets and a black and turquoise silk gown. We had to have ballroom dancing lessons in the dinner hour for a few eeks before, no pop music allowed, (1972 as well )
I think I had a school 'disco'. Not even on the same planet as my daughter's prom. Her dress cost me about £200 and I felt like I hadn't matched up to other parents because I took her there in my car rather than the limos, vintage fire engine, horse and carts and even a tank that delivered some of her classmates.