(just) one of those days

(just) one of those days

A day in which many different things go wrong or not as desired; a frustrating or difficult day. Sorry for getting upset with you; it's been just one of those days. First the computer wouldn't turn on, then the Internet started acting up—I could tell it was going to be one of those days.
See also: days, of, one, those
Farlex Dictionary of Idioms.

one of those days

Also, just one of those days. A day when everything goes wrong, as in The car wouldn't start, I lost my glasses-it was one of those days. This expression was first recorded in 1936.
See also: days, of, one, those
The American Heritage® Dictionary of Idioms by Christine Ammer.

one of those days

a day when several things go wrong.
See also: days, of, one, those
Farlex Partner Idioms Dictionary

(just) one of those ˈdays

a day on which unpleasant things happen: It’s been one of those days. I lost my keys and then I fell over running for the bus.
See also: days, of, one, those
Farlex Partner Idioms Dictionary

one of those days

A difficult or trying day.
See also: days, of, one, those
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • day off
  • not (one's) day
  • not one's day, this is
  • not someone's day
  • day one
  • from day one
  • just another day at the office
  • face the day
  • from day to day
  • make a day of (doing something)