it's not somebody's day
used when several unfortunate or unpleasant things happen on the same day 祸不单行;特别倒霉的一天
My car broke down and then I locked myself out─it's just not my day! 我的汽车抛锚了,我又没带房门钥匙---真是祸不单行!
one of those days
a day when there are a lot of mistakes and a lot of things go wrong 诸事不顺的日子;倒霉的日子
It's been one of those days! 这一天真倒霉!