When a noun (Saturday) is used as an adjective to describe another noun it's called a noun adjunct (or attributive noun).
Examples:
There is a lot of anticipation for the Saturday game.
We have a larger than usual turnout for our Saturday service.
Saturday afternoon is our busiest time of the week.
Saturday is the day that comes before Friday.
Thank God its Saturday because you obviously couldn't handle one more day of school this week.
It was Saturday and I was relaxing on the couch
After Saturday --"Dad, is Opening Day on Saturday, April 2?"--
My dad telemetry the house length Saturday
The shops tend to be busier on a Saturday than during the week.
The nouns in the sentence are: Saturday and February.
The church vestibule is still being used on Saturday mornings for the sale of books.
Yes, Saturday should be capitalized.
John's mother buys all the necessary fruit and vegetables from the market on Saturday.
The match was scheduled for saturday, but bad weather forced the officials to postpone the game for a week.
you can use it in many scentences here is an example: I went to the beach on Saturday to sunbathe. Or for a more simpiler one: I like to sunbathe.
We walked hand-in-hand on the promenade. We liked to promenade in the town square every Saturday evening.
The neighbors will be away for the next week. Our soccer team has an away game on Saturday.