it's not somebody's day
used when several unfortunate or unpleasant things happen on the same day 禍不單行;特別倒霉的一天
My car broke down and then I locked myself out─it's just not my day! 我的汽車拋錨了,我又沒帶房門鑰匙---真是禍不單行!
one of those days
a day when there are a lot of mistakes and a lot of things go wrong 諸事不順的日子;倒霉的日子
It's been one of those days! 這一天真倒霉!