On Friday the first snow of this year: it was falling virtually throughout the daylight hours and untypically settled, rather than thawed immediately or before the next morning. In fact it still remains on the grass and some roofs, with the help of a bit more snowfall on Saturday and today. So everything is that wee bit nicer now. Given that the minimum daily temperature had already been falling close to zero for some time, I think I can proclaim winter as begun, whatever astronomers may think about it.
After all, unless I'm mistaken, meteorologists will proclaim it as begun tomorrow.