星期日用英语说是Sunday。它的来源是源自于古罗马神话中的太阳神叫做Sol，日耳曼神话中的太阳神叫做Sól，在拉丁文中叫做dies solis，意思是"太阳的日子"。在英语中，Sunday直接来源于拉丁文，并且没有发生过任何改变。

一些英文例句：

I usually go to church on Sunday.

Sunday is my favorite day of the week because I get to relax and spend time with my family.

I have to work on Sunday, so I don't get to enjoy the weekend like everyone else.