No, sorry, not true.
I'm sure someone or other has written an article about it around here too.
Male market working hours have fallen substantially, female market working hours have risen. Male household working hours have fallen, female household working hours have fallen substantially.
Leisure hours for men and women have risen strongly over the past century.
That Keynes and only working 15 hours a week thing has in fact happened. It's the household working hours that have fallen.