Also because today we have accurate clocks and most of us don't depend on seasons for anything. Farmers care about when to plant, and a few gardeners pay atten

Also because today we have accurate clocks and most of us don't depend on seasons for anything. Farmers care about when to plant, and a few gardeners pay attention, but for most of us nothing changes in life. (I'm carefully not counting the traditional vacations that most of us have around this time - though that is important to us and historically related, we could move the date and it wouldn't affect anything else).