a) leaves are completely gone, <- totally correct!
b) folks are wearing autumn colors, <- nice notion! you are the only one who noticed that, I did not myself. nice!!

c) the light is very oblique, winter angle.

very well noticed! well, the thing is we have extremely short 'light day' (with 22 of December to be the shortest day of the year). In winter, we have no green grass (even with the Global Warming sh..t) - it is snow, or it is some frozen dirt/soil. The colours are so fresh it looks like spring - tho it is October. Quite unusual look for this month, indeed. But one's mind can deduce and beat it. Congrats! Sending you my congratulations, and a Hive !PIZZA. 🙏 Thanks for your visit, a pleasure for me!