Everyone has good days, and everyone has hard days.

每个人都有运气好的时候，也都有运势不好的日子。

Everyone has good days and bad days.

人人都有运气好和运气差的时候。

There have been good days and tough days.

我们有过好日子也有过艰难日子。

They can have their good days and bad days.

他们也时好时坏。

I quit my job on one of my good days, a Friday.

我在我的一个美好的日子，一个星期五，辞去了工作。