Business days — in plain language

Plain language

weekdays—Monday through Friday—when offices and businesses are normally open, not counting weekends or official public holidays

• weekdays only
• working weekdays
• non-holiday weekdays
• Monday through Friday excluding holidays

What to watch for

• Non-lawyers often assume 'days' in any document means 'business days.' Unless a contract or statute specifically says so, courts typically interpret a bare reference to 'days' as calendar days.
• Business days and working days are not always identical; some industries treat Saturday as a working day, making the distinction load-bearing in certain shipping or retail contracts.
• In banking law under Regulation Z, 'business day' carries two separate definitions depending on context; confusing the narrow and broad versions can affect a borrower's rescission rights.
• The holidays excluded can vary by jurisdiction and by any definition clause in the contract; a federal holiday is not always a state holiday, and private employers may observe neither.

Distinguishing from Calendar Days. The most critical translation choice is between "business days" and "calendar days." If a contract says "ten calendar days," the deadline can fall on a Saturday or holiday and will not automatically shift. If it says "ten business days," every weekend and holiday is skipped, making the window potentially two or three weeks long. Substituting one for the other in plain-language rewrites fundamentally changes the deadline and can expose a party to a missed filing or a waived right.

Context-Dependent Meaning. In most commercial contracts, business days means Monday through Friday minus holidays. However, in federal banking law—specifically Regulation Z under the Truth in Lending Act—the term has two distinct definitions. The narrow definition (days the creditor's office is open to the public for substantially all business functions) governs most routine disclosures. A broader definition (all calendar days except Sundays and federal public holidays, so Saturdays count) governs the three-day right of rescission on certain home-secured loans and early mortgage disclosures. Translators working on consumer-credit documents must identify which definition applies before simplifying the text.

Common Misunderstandings by Non-Lawyers.

• "Five business days is just a regular workweek." (No — if a holiday falls mid-week, five business days can span more than seven calendar days.)
• "Any 'day' mentioned in a contract is a business day." (No — without a specific qualifier, courts generally read plain 'days' as calendar days, which include weekends and holidays.)
• "Business days always exclude Saturdays everywhere." (Not always — in banking law under Regulation Z, Saturday counts as a business day for rescission and certain early disclosures, even though most offices are closed that day.)

Legal definition

Business days are the weekdays—Monday through Friday—on which businesses and government offices are ordinarily open, excluding Saturday, Sunday, and officially recognized public holidays. When a contract, statute, or court rule measures a deadline in business days, the counter skips every weekend day and every recognized holiday, making the actual elapsed calendar time longer than the raw number suggests. The term differs from "calendar days," which count every day without exception, and from "court days," which depend on whether the specific court is in session. In most U.S. commercial and legal contexts, business days are determined by federal and state holiday schedules, though a contract may define its own list of excluded holidays.

Meanings by context

banking law (Regulation Z / Truth in Lending Act): For mortgage rescission periods and some loan disclosures, Saturday counts as a business day even though most offices are closed; only Sundays and federal holidays are skipped.

Examples

Where you'll see it

• contract notice and response deadlines
• banking and loan disclosure requirements
• employment termination and layoff notices
• government administrative response periods
• commercial delivery and performance timelines

Related terms

• calendar days
• court days
• running days
• working days
• notice period
• grace period

Word details

Pronunciation

BIZ-nis dayz

Part of speech

noun

Origin

Old English — days belonging to the conduct of business or commerce

Domains

contract law, commercial law, banking law, civil procedure

Frequency

very common

Formality

moderate