Mostly because ancient calendars sucked and they constantly drifted out of alignment.
That issue originated in the ancient Roman Calendar, which is so old that we really don’t know who invented it or when, but it’s been likely some time around 700 BC.
So all in all, a 10 day error over 2700 years isn’t all that bad.
But why celebrate the new year 10 days after the solstice? It would make way more sense to celebrate it on the solstice.
Mostly because ancient calendars sucked and they constantly drifted out of alignment.
That issue originated in the ancient Roman Calendar, which is so old that we really don’t know who invented it or when, but it’s been likely some time around 700 BC.
So all in all, a 10 day error over 2700 years isn’t all that bad.
Well because that’s when January 1st is. duh
/s
We need to make sure that the days have started getting longer
Because we all remember what happened when we tried the honor system. “Trust, but verify.”