(one's) day in court
The opportunity to voice one's complaints or explain one's actions. This phrase does not have to refer to an actual court appearance. You'll get your day in court, but, for now, let your sister tell her side of the story. I'm glad I'm finally getting my day in court and can refute those slanderous claims.
someone's day in court
Someone's day in court is the time when they have the opportunity to give their evidence about something, usually in a court of law. We are looking forward to our day in court, when the mountains of evidence we have collected will be displayed to the jury. He will have his day in court, we hope, and then all of us will know what really happened.