This is the 4925th most frequent Polish word.
piątkowym
"Of Friday" or "Friday-related."
The word 'piątkowym' here represents the instrumental form of 'Friday,' used as an adjective describing the specific afternoon.
Spacerowaliśmy nad rzeką piątkowym popołudniem.
We walked by the river on a Friday afternoon.
In this case, 'piątkowym' again functions adjectivally, describing the evening's relation to Friday in an instrumental case.
Uwielbiam piątkowym wieczorem odpoczywać przy książce.
I love relaxing with a book on a Friday evening.
Here, 'piątkowym' again as an adjective modifies 'lunch,' aligning with Polish grammar rules specifying events or items related to a day in an indirect case.