Как понять, что пришла зима? Перестало получаться смотреть на свое отражение в окнах по вечерам - внутри горит свет и отражения не видно.

fits perfectly: Christmas lights

I know I should have put 'Christmas lights' here, because it's more into the topic, but I just can't lie to myself. My winter this year flows under the melody of 'Everglow'.

Yes.

winter came unexpectedly, on the 1st of December

The moment when you raise your eyes from the ground and suddenly notice that the world looks like a mirage, you understand that you got a whole lot of really good music. Because it fits the surroundings, even if the melody wasn't initially meant for such a scenery