Since it's winter, let's look on the bright side of it getting dark so early... And celebrate those precious couple of hours every morning and evening where there is neither full daylight nor complete darkness. The blue hour!
Here are some samples to get this month's challenge started!
M9, ISO 400, Summilux-M 50mm f/1.4 ASPH, 1/90s @ f/2:
M9, ISO 640, Summilux-M 50mm f/1.4 ASPH, 1/60s @ f/2:
M8, ISO 1250, Biogon 2,8/25 ZM, 1/15s @ f/2.8:
M8, ISO 160, Nokton 35mm f/1.2, 1/8s @ f/2.8:
M9, ISO 400, Summilux-M 50mm f/1.4 ASPH, 1/30s @ f/4: