Formal:
* À samedi! (This is the most common and straightforward way to say it.)
* On se voit samedi. (This is a bit more formal and translates to "We see each other Saturday.")
Informal:
* Samedi! (This is a very casual and common way to say it.)
* On se retrouve samedi. (This means "We'll meet up Saturday.")
* Je te vois samedi. (This means "I see you Saturday.")
Choosing the right phrase:
* À samedi! is appropriate for almost any situation.
* On se voit samedi. is good for people you know well but not super close to.
* Samedi! is for close friends or family.
* On se retrouve samedi. is good if you are making plans to do something together.
* Je te vois samedi. is best reserved for close friends or significant others.