Few people know this was one of the reforms of Vatican II:
Pastors of souls should see to it that the chief hours, especially Vespers, are celebrated in common in church on Sundays and the more solemn feasts. And the laity, too, are encouraged to recite the divine office, either with the priests, or among themselves, or even individually.
Sunday and holy day Vespers: imagine that! And the laity praying the Hours, too.