A business day is a day on which ordinary commercial or government business is transacted. In practice, that usually means Monday through Friday, excluding weekends and recognized holidays. The term shows up in contracts, statutes, court rules, and agency notices, and its meaning controls when a deadline falls. Getting it wrong can mean a missed filing, a late payment, or a default.
The General Meaning
In everyday usage, a business day is any weekday that is not a holiday. Banks, courts, government offices, and most companies follow that pattern, so a business day typically excludes Saturday, Sunday, and days such as New Year's Day, Independence Day, and Thanksgiving. The general meaning is a default, not a universal rule. A contract or statute can define the term differently, and when it does, that definition controls.
Business Day, Calendar Day, Banking Day, and Court Day
| Term | Usual meaning |
|---|---|
| Calendar day | Every day of the year, including weekends and holidays |
| Business day | A weekday when business is normally conducted, excluding most holidays |
| Banking day | A day a bank is open to the public for substantially all of its banking functions |
| Court day | A day the court is open, with filing deadlines set by court rules |
These terms are not interchangeable. A deadline stated in calendar days includes weekends and holidays, while one stated in business days does not. A banking day is defined in the Uniform Commercial Code and in federal banking rules, and it can exclude a day that is otherwise a business day. A court may be closed for weather or another reason even when the calendar says it is a business day.
Why the Distinction Matters
Deadlines are the main reason the term matters. A contract might require notice within five business days, a statute might give a consumer three business days to cancel, and a court rule might set a response time in days. If you count weekends when the rule counts business days, you may act early, which is usually harmless. If you count business days when the rule counts calendar days, you may act late, which can be fatal to a claim. Always read the definition in the document or rule that sets the deadline.
Federal Holidays
Federal law lists the holidays observed by the federal government in 5 U.S.C. § 6103. They include New Year's Day, Martin Luther King Jr. Day, Washington's Birthday, Memorial Day, Juneteenth National Independence Day, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day, and Christmas Day. When a holiday falls on a Saturday or Sunday, it is often observed on the nearest weekday. The Office of Personnel Management at opm.gov publishes the federal holiday schedule each year.
Weekends and Holiday Extensions
Many rules provide a safety valve. Under Rule 6(a) of the Federal Rules of Civil Procedure, when the last day of a period falls on a Saturday, Sunday, or legal holiday, the period continues to run until the next day that is not a weekend or holiday. Many state court rules and contract drafting conventions follow the same idea. The extension applies to the end of the period, not the beginning, and it does not apply if the governing document says otherwise. A court order can also extend or shorten a deadline.
State Variation
State holidays are not uniform. Some states observe holidays that the federal government does not, and state offices may close on days that federal offices remain open. Examples include days honoring local figures, statehood days, and regional observances. Because a state holiday can turn an ordinary weekday into a non-business day for state agencies and courts, a deadline that depends on a state calendar should be checked against that state's official holiday schedule, usually published by the state's department of administration or court system.
Contracts Can Define the Term
Parties are free to define business day in their agreement. A contract might say that business days exclude only federal holidays, or that they follow the calendar of a particular state or exchange. It might also address partial days, such as when a notice delivered after a stated hour is treated as delivered the next business day. When a contract supplies its own definition, that definition overrides the general understanding, so the first step is always to read the contract.
Partial Days and Delivery Rules
Some rules treat a partial day as a full day, and others do not. A notice delivered after the close of business might be deemed delivered on the next business day, which shifts the start of a response period. Statutes that give a right to cancel, such as certain consumer credit transactions, count business days from delivery of the required disclosures. When a deadline is short, the exact time of delivery can decide whether a response is timely.
Legal Holiday in Court Rules
Court rules often use the phrase legal holiday rather than business day. A legal holiday in the federal courts includes the days set by federal law and any other day declared a holiday by the President or Congress. State courts follow their own definitions, and a state legal holiday may not match the federal list. A filing due on a state holiday can be timely on the next day the clerk's office is open, but only if the rule provides that extension.
How to Count Business Days
- Identify the start date and whether the first day counts. Many rules exclude the day of the event that starts the clock.
- Identify the holidays that apply. Use the federal schedule, the state schedule, or the contract's definition as required.
- Count forward, skipping weekends and the applicable holidays.
- Check whether the end date falls on a weekend or holiday, and extend to the next open day if the rule allows.
- Confirm the result against the specific rule or contract before relying on it.
This guide is general information, not legal advice. The definition that governs a deadline comes from the contract, statute, or court rule at issue, and those sources can differ from the everyday meaning described here.