Deadline Calculator

Court Filing Deadline Calculator

Know Your Exact Filing Date Before the Clock Runs Out

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Courts do not care how strong your case is if your documents arrive one day late. A missed filing deadline can get your complaint dismissed, your appeal rejected, or your motion denied before a single judge ever reads it. The rules that govern when something is due, calendar days versus business days, federal holidays, mail service add-ons, and local court cutoffs vary by jurisdiction, and a simple arithmetic mistake is all it takes to lose a right you cannot get back. 

This calculator removes that risk by doing the counting for you, automatically adjusting for weekends, federal holidays, and roll-forward rules so the date you see is the date a court would recognize. Enter your trigger date, select your time period, choose your counting method, and get your exact court filing deadline in seconds.

Calculating a broader legal deadline — a statute of limitations or response window rather than a court filing? See our Legal Deadline Calculator.

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Court Filing Deadline Calculator

YOUR FILING DEADLINE

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Reference tool only. Always verify against the controlling statute and your court's rules.

What Is a Court Filing Deadline Calculator?

A court filing deadline calculator is a legal date computation tool that takes a trigger event, a judgment date, a service date, or an order entry, and produces the exact calendar date by which your documents must be filed with the court.

It sounds simple. It rarely is.

Federal courts, state courts, superior courts, and small claims courts each follow different counting rules. Some count every calendar day. Others skip weekends and holidays. Some rules add extra days when service is made by mail. Miss the nuance, and you miss the deadline.

This tool handles the arithmetic so you can focus on the filing. Enter your trigger date, select your time period, indicate whether your rule runs on calendar days or business days, and get your exact court filing deadline, including a roll-forward if the date lands on a weekend or recognized holiday.

How to Calculate Your Court Filing Deadline

Identify your trigger date

Every court deadline begins with a specific event. For most filing deadlines, that event is one of the following: the date a complaint was served on you, the date a judgment was entered, the date a motion was filed, or the date the court issued its order. Enter this as your base date.

Find the required period in your rule

Check the applicable statute, rule, or court order for the exact number of days. Common periods include 21 days to respond to a complaint under FRCP Rule 12, 30 days to file a notice of appeal in a federal civil case, and 14 days to file a reply brief. Do not rely on memory; look it up every time.

Choose calendar days or business days

This is the step most people get wrong. Statutes of limitations generally run on calendar days. Court response deadlines generally run on business days. Some state court rules use court days, which further exclude state-specific holidays and courthouse closures. When the rule is silent, check your jurisdiction's general code of civil procedure.

Run the calculation

The calculator applies your counting method, steps over weekends and holidays where required, and displays your final filing deadline with the day of the week included, because knowing it lands on a Monday versus a Friday affects how you plan your week.

Cross-check before you file

Use this result as your working date. Before you put documents in an envelope or click submit on an e-filing portal, verify the deadline against the rule itself, your court's current holiday schedule, and any local rules that modify the standard period.

Set a buffer deadline and calendar reminder

The date the calculator gives you is the last possible day you can file not the day you should file. Court e-filing portals go down. Printers jam. Unexpected conflicts arise. Build in at least two to three business days before your actual deadline as your internal target date, and set a calendar reminder the moment you complete this calculation.

Supreme Court Filing Deadlines

The United States Supreme Court operates on its own procedural timeline governed by the Rules of the Supreme Court of the United States, distinct from both the Federal Rules of Civil Procedure and the Federal Rules of Appellate Procedure.

Petition for Certiorari

The most commonly encountered Supreme Court filing deadline is the deadline to file a petition for a writ of certiorari. Under Supreme Court Rule 13, a petition for certiorari must be filed within 90 days of the entry of the judgment or decree sought to be reviewed, or within 90 days of the denial of a timely petition for rehearing.

The 90 days are calculated from the date the lower court’s judgment was entered, not from the date it was mailed or received. The Court strictly enforces this deadline. Extensions are available only by order of a Justice upon application, and are granted sparingly. If you need an extension, file the application well before the deadline, not the day before.

The petition must be received by the Clerk of the Supreme Court by the due date. Electronic filing is not available for certiorari petitions from parties who are not registered with the Court’s electronic filing system. Physical copies must be delivered.

Merits Briefing Schedule

Once certiorari is granted, the Supreme Court sets a briefing schedule:

Petitioner’s opening brief on the merits due 45 days after the order granting certiorari (Rule 25(a)(1))

Respondent’s brief on the merits due 35 days after the petitioner’s brief is filed (Rule 25(a)(2))

Petitioner’s reply brief due 35 days after the respondent’s brief is filed, or 10 days before argument if argument has been scheduled, whichever is earlier (Rule 25(a)(3))

All of these deadlines can be extended by order of the Court, and extensions are routinely granted in merits cases. However, extensions must be requested in advance.

Amicus Curiae Brief Deadlines

Amicus curiae briefs in support of a party on the merits are due seven days after the principal brief of the party being supported is due (Rule 37(3)(a)). Amicus briefs at the certiorari stage are due within 30 days after the case is distributed for conference.

Common Court Filing Deadline Mistakes and How to Avoid Them

Counting the trigger date as day one. Under both federal and California rules, the day the triggering event occurs is day zero. Counting begins the following day. This single error shifts your deadline one day earlier than it should be, which can result in an unnecessarily rushed filing or worse, a missed deadline if the calculation runs in reverse.

Ignoring the mail service add-on. If the document that started your clock was served by mail, most court systems add days to your response period. In federal court, that is three days under FRCP Rule 6(d). In California, it ranges from two to twenty days, depending on where the parties are located. Forgetting this addition is a common source of incorrect deadline calculations.

Using federal holidays only in a state court matter. State courts observe state-specific holidays in addition to federal holidays. California, for example, observes César Chávez Day on March 31, which is not a federal holiday but closes California state courts. A deadline that appears to fall on that date would roll to the next court day.

Applying the wrong day-counting method to the wrong type of deadline. Statutes of limitations and court response deadlines play by different rules. A statute of limitations almost always runs in calendar days, counting every day, including weekends and holidays. A court response deadline after service almost always runs in business days, with roll-forward on weekends and holidays. Apply the calendar-day method to a response deadline, and you may conclude you have more time than you actually do.

Missing court-specific local rule modifications. The FRCP, FRAP, and California Rules of Court establish default deadlines. But every court also has local rules, and many of those rules modify the standard periods, shortening response times for certain motions, requiring earlier lodging of proposed orders, or establishing department-specific ex parte submission times. Always read the local rules for the specific courthouse and department where your case is pending.

California Court Filing Deadlines

California follows its own day-counting rules under CCP §§ 12, 12a, and 12c, plus state-specific judicial holidays and Los Angeles Superior Court’s local ex parte filing requirements. For the full breakdown — including service-method rules, the holiday calendar, and LASC department practices — see our California Court Deadline Calculator.

Frequently Asked Questions About Court Filing Deadlines

Everything you need to know about Court Filing Deadlines, calculators, and timely filing
requirements.

What is a court filing deadline?
A court filing deadline is the specific date by which a legal document, such as a complaint, answer, motion, notice of appeal, or brief, must be received by the court. If a filing deadline is missed, the consequence can range from losing the right to raise an argument to having a motion denied to having a case dismissed with prejudice.
Under most federal district court local rules, electronically filed documents are due by midnight in the court’s local time zone on the due date, unless local rules specify an earlier cutoff. Always confirm the specific cutoff time in your district’s electronic filing rules, because some districts require filing by 5:00 p.m. or even earlier.
Under both federal and California rules, a deadline that falls on a Saturday, Sunday, or recognized court holiday automatically rolls forward to the next court day. The court does not expect you to file on a weekend, and a filing made on the next business day following a weekend deadline is timely.

Yes — California follows CCP §§ 12, 12a, and 12c rather than the Federal Rules of Civil Procedure, and observes its own judicial holidays. See our California Court Deadline Calculator for the complete rules.

Notice of an ex parte application in the Los Angeles Superior Court must be given to all parties no later than 10:00 a.m. on the court day before the hearing. The application and supporting documents are typically submitted to the assigned department on the morning of the hearing, but timing varies by department and judge. Always call the clerk of the assigned department to confirm.
Under FRCP Rule 12(a)(1)(A)(i), a defendant has 21 days after being served with the summons and complaint to serve an answer. If service was waived, the period is 60 days. If the United States or a federal agency is the defendant, the period is 60 days.
In most federal civil cases, the notice of appeal must be filed within 30 days of the entry of the judgment or order being appealed (FRAP Rule 4(a)(1)(A)). The period extends to 60 days when the United States, a federal agency, or a federal officer is a party.
You have 90 days from the entry of the judgment or decree you want reviewed, or from the denial of a timely petition for rehearing. The 90 days is strictly enforced, and extensions require an order from a Justice.
The statute of limitations that applies to your underlying claim determines how long you have to file. Once you file, service on the defendant must be completed at least 15 days before the hearing date (20 days for defendants in a different county). If you lose and want to appeal, you have 30 days from service of the notice of entry of judgment to file your notice of appeal.