1Saturday, the sixth day of the week, following Friday and preceding Sunday — commonly a day off.
土曜日はいつも掃除をする。
I always clean on Saturdays.
今週の土曜日、映画を見に行く予定だ。
I'm planning to go see a movie this Saturday.
土曜日の夜は繁華街が特に賑やかだ。
The downtown area is especially lively on Saturday nights.
来週の土曜日は仕事があるので出かけられない。
I have work next Saturday, so I can't go out.