on Sundays
every Sunday
Sunday afternoon
Sunday morning
A: Do you work on Sundays?
A：你在星期日工作吗？
B: No, I only work from Monday to Saturday.
B：不，我只从周一工作到周六。
1) 星期日的复数形式
2) 每个星期日
1. 星期日（复数）
noun
1. The plural form of Sunday, used to refer to recurring Sundays.