This is the 6990th most frequent Turkish word.
cumanın
"Of Friday" or "Friday's."
Cumanın here indicates possession, i.e., the morning belonging to Friday.
Cumanın sabahı erken kalkarım.
I wake up early on Friday morning.
Cumanın defines the Friday in question, used in possessive context for emphasis.
Bu cumanın planları değişti.
The plans for this Friday have changed.
Cumanın here emphasizes the association of Friday with its traditional prayers.