If the solstice occurs at that moment when the earth is at its maximum tilt, then why does the weather extreme begin that day, and last for so long afterwards?
This question has vexed me since I was a child. In other words, "winter" is said to BEGIN at the winter solstice. But if that is the day when the sun's center is at its highest northward point (for those of us north of the tropics) then that means it begins easing its way back toward the equator from that point. So why does the winter solstice occur at the BEGINNING of winter, as opposed to the MIDDLE of winter?