czwartek

Czwartek is the Polish name for Thursday. In the standard Polish calendar, it is the fourth day of the week, following Wednesday (środa) and preceding Friday (piątek). Like other weekday names in Polish, Czwartek is capitalized when referring to a specific day.

Etymology: The term is derived from czwarty, meaning "fourth," with the diminutive suffix -ek forming a noun. The same root yields cognate forms in other Slavic languages, such as Czech čtvrtek and Russian четверг (chetverg).

Usage and onomastics: Besides naming the weekday, Czwartek may occur as a surname or as a place name in Poland, reflecting historical toponymic or family-name formation from the day-name. In broader contexts, the word anchors discussions of the Polish calendar and language, and is used wherever the Thursday of the week is referenced.