Court deadline calculator

How courts actually count time

Almost every deadline in litigation is expressed the same way: a number of days measured from a triggering event. You were served, an order was entered, a judgment came down, a hearing is set. The trap is that "21 days" almost never means "add 21 to today's number." Courts compute time under a specific rule, and three parts of that rule are easy to get wrong, which is exactly why a quick mental calculation, or an AI Overview that just adds days, will hand you the wrong date.

The first part is the exclusion of the trigger day. Federal Rule of Civil Procedure 6(a)(1)(A) says to exclude the day of the event that starts the clock and begin counting on the next day. If you are served on a Monday and have five days to respond, Tuesday is day one, not Monday. State codes phrase it differently but reach the same result: the first day is dropped, the last day is included.

Calendar days versus court days

The second part is the unit you count in. Before the 2009 federal amendments, short periods skipped weekends and holidays while counting. The amendments simplified this so that all federal periods now count calendar days, every day counts, and only the final day is adjusted if it falls on a weekend or holiday. Many state systems did not follow, and still count short periods in court days, where Saturdays, Sundays, and court holidays are skipped during the count itself. California, for example, counts certain notice periods in court days under Code of Civil Procedure section 12c. A five-court-day notice and a five-calendar-day notice can land on completely different dates, so the calculator above lets you switch between the two and shows how many non-business days the court-day mode skipped.

The last-day roll, in both directions

The third part is what happens when the period ends on a non-business day. Under FRCP 6(a)(1)(C), if the last day of a forward period is a Saturday, Sunday, or legal holiday, the deadline continues to run until the end of the next day that is none of those things. A deadline that would land on the Fourth of July moves to the next open court day. The subtle case is a backward deadline, "serve and file a motion at least 14 days before the hearing" under FRCP 6(c)(1). Here you count backward from the hearing, and if that date is a weekend or holiday it rolls earlier, never later, so the opposing party always receives the full notice the rule guarantees. The calculator handles both directions and flags any roll it makes.

What this tool does not include

A deadline tool is only as honest as the things it admits it cannot see. This one does not apply service add-on days, for example, the three extra days FRCP 6(d) grants when a paper is served by mail or certain electronic means. It does not know your district's electronic-filing cutoff time, which can make a filing "late" even on the correct calendar day. It does not account for tolling, the discovery rule, local standing orders, or emergency administrative orders that close a courthouse. And the holiday calendars are general reference sets; a specific court may close for a local civic holiday that is not on any statewide list. Use the output as a first draft of your deadline, then confirm it against the rule that actually governs and your court's own calendar.

Working a deadline end to end

Say a federal complaint is served on a defendant in the United States on a Friday. FRCP 12(a)(1)(A)(i) gives 21 days to answer. You exclude Friday, count 21 calendar days, and land on a Friday three weeks out. If that day were a holiday, the answer would be due the following Monday instead. To preserve the date, set a personal reminder several days early using the add-to-calendar button, which exports a standards-compliant .ics file with a one-week alert. If you need to count plain business days for a contract term instead of a court rule, switch the jurisdiction to the generic business-days mode, which counts Monday through Friday with no holidays applied. For raw day counting between two known dates, the days-between calculator and the working-days calculator cover the non-deadline cases, and the statute-of-limitations calculator handles the outer filing window for a claim.