Understanding Delaware Court of Chancery Timeline & Computation Rules
The Delaware Court of Chancery is America's preeminent forum for corporate and business entity litigation. Because the court resolves complex merger disputes, fiduciary duty claims, and shareholder actions on accelerated schedules, legal professionals must calculate filing and service deadlines with surgical precision.
Under Court of Chancery Rule 6(a), time computation is governed by strict procedural guidelines. The day of the underlying event is excluded from calculations. If the computed timeline is 11 days or more, calendar days are counted, and only a deadline landing on a weekend or judicial holiday shifts forward to the next business court day.
The Critical Less-Than-11-Days Rule
A common procedural trap for out-of-state corporate litigators is the Court of Chancery's short-period exclusion rule. When any court rule, scheduling order, or statute dictates a period of less than 11 days (such as the strict 5-day window to file a Rule 59(f) Motion for Reargument), intermediate Saturdays, Sundays, and legal holidays are automatically excluded from the count. This effectively extends a 5-day filing period to a full calendar week, but it requires diligent tracking to avoid waiver of valuable jurisdictional rights.
Service Method Extensions and File & ServeXpress
Under Court of Chancery Rule 6(e), service by traditional first-class postal mail adds an automatic 3-day extension to the responding party's deadline. However, under Rules 5(g) and 6(e), service completed electronically via the court's File & ServeXpress portal is deemed complete upon transmission and does not trigger the 3-day mailing extension.