Attorneys practicing in Delaware courts may not all be working until midnight, but that’s when the courts consider a business day to end, Vice Chancellor Morgan Zurn ruled in an case of first impression Wednesday.

Zurn ruled that a stockholder complaint was premature because it wasn’t filed after the close of a five-day waiting period. Since the court papers were filed at 5:03 p.m., Zurn found the plaintiffs were six hours and 57 minutes early. In her ruling Zurn dismissed the complaint.