This is the 5414th most frequent Polish word.
styczniowego
"Styczniowego" means "of January" or "January-related" in English.
In this sentence, 'styczniowego' is an adjective in the genitive singular form, describing 'wieczoru' (evening). It denotes the attribute of the evening occurring in January.
Spacerowaliśmy po parku podczas styczniowego wieczoru.
We were walking in the park during a January evening.
Here, 'styczniowego' serves as an adjective in the genitive singular form, modifying 'krajobrazu' (landscape), indicating the landscape's occurrence in January.
Nie mogę zapomnieć styczniowego krajobrazu pokrytego śniegiem.
I cannot forget the snowy January landscape.
In this case, 'styczniowego' is an adjective in the genitive singular form connected to 'słońca' (sun), implying the sun's attribute relating to January.