saturday
n. C / Un. the day of the week between Friday and Sunday. For many people, it is the first day of the weekend when they do not have to work.
n. the seventh day of the week, falling between Friday and Sunday. Often used as a modifier before other nouns to indicate timing.
I usually go to the gym on Saturday morning.
Most people look forward to Saturday because they can sleep late and spend time with their families.
The local market is particularly vibrant on Saturday, attracting vendors from across the county who display their seasonal produce to the weekend crowds.
From Middle English Saterday, from Old English sæterdæġ, earlier sæternesdæġ (“Saterday”, literally “Saturn's day”), from Proto-West Germanic *Sāturnas dag; a translation of Latin diēs Saturnī. Compare West Frisian saterdei (“Saturday”), Dutch zaterdag (“Saturday”), German Low German Saterdag (“Saturday”).
When used to refer to the day in general, it is a proper noun and capitalized. It can be used countably to refer to multiple instances of the day (e.g., 'on Saturdays').
I will see you in SaturdayI will see you on SaturdayEnglish uses the preposition 'on' for specific days of the week, not 'in'.