To what age should girls wear white socks?

[Chacasta]

There seems quite a variation in the age to which girls wear white socks - at least for school. Some girls are in tights by the age of ten or eleven while others - especially. I understand, at schools in Northern Ireland - wear white socks until they are fifteen or sixteen.

When I was growing up in the late 1960s and 1970s girls often wore white socks for school and outside until they were fifteen or sixteen and my own all girls' school only allowed sixth formers to wear tights. We wore white knee socks in winter and white ankle socks in summer.

To what age do readers think girls should remain in socks? And should they wear them all the time whether at school or not?