It’s not somebody’s day
Definition 1 of 1
Pro Tip 1/3Unlucky Streak
Use this phrase when someone experiences a series of unfortunate events within a short time. 
She spilled coffee on her shirt and then tripped. It's clearly not her day.
Pro Tip 2/3Sympathy Expression
This phrase often expresses sympathy or empathy towards someone who's having a tough time. 
I heard about your car breaking down. Sounds like it’s not your day, huh?
Pro Tip 3/3Colloquial Usage
The phrase is informal and typically used in casual conversation rather than formal writing. 
After forgetting his umbrella and getting soaked in the rain, he said, 'it's not my day today.'