Business Days vs Calendar Days in a Real Estate Contract

A 10 day inspection period sounds like a fact. It is not, until you know two more things: whether those are calendar days or business days, and which day counts as day one. Get either one wrong and the date you write on the whiteboard is off, sometimes by a week. This is the single most common source of a blown deadline that was never actually blown, it was just computed wrong.

None of this is legal advice, and none of it overrides your specific contract. Every standard form can, and does, override the defaults below. What follows is how the counting actually works once you know which basis a period uses, which is the part coordinators get wrong even when they are reading the contract correctly.

Calendar days count every day. Business days skip weekends and federal holidays.

A calendar day period counts every day on the wall calendar, Saturdays, Sundays and holidays included. A business day period skips Saturdays, Sundays, and any federal holiday that falls inside the window. The same number, 10, produces two different dates depending on which basis the contract specifies, and the gap gets wider the more weekends and holidays sit inside the window.

Day zero: the day after acceptance is day one

The near-universal convention, and the default most calculators and transaction software use, is that the date of acceptance is day zero and the day after acceptance is day one. A 10 day period on a contract accepted on a Monday runs Tuesday through the following Wednesday night, not Monday through Wednesday. This is a default, not a law, some forms count differently, so check the specific contract language when a deadline is close.

How a business-day period is actually counted

Business-day counting does not skip to the Nth weekday on a calendar grid. It walks forward one day at a time from the base date, and only increments the count on a day that is actually a business day. That distinction matters at the start of a period: 3 business days from a Monday is Thursday, not Wednesday, because Monday itself is the base date and does not count. Tuesday is business day one, Wednesday is business day two, Thursday is business day three.

Which federal holidays get skipped

A business-day count also skips federal holidays. The eleven observed under 5 U.S.C. 6103 are New Year's Day, Martin Luther King Jr. Day, Presidents' Day, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day, and Christmas Day. Six of those (Presidents' Day, Memorial Day, Labor Day, Columbus Day, MLK Day and Thanksgiving) are defined as a specific weekday of a specific week, so they never fall on a weekend to begin with. The other five are fixed calendar dates, and when one of those lands on a Saturday it is observed the Friday before, when it lands on a Sunday it is observed the following Monday. A deadline calculator should compute this from the rule every year, not from a hardcoded list, so it keeps working correctly in 2030 and beyond without anyone updating a table.

What happens when a deadline lands on a weekend or a holiday: the roll

Almost every deadline in a standard contract rolls forward when the computed date lands on a non-business day: the actual due date becomes the next business day. This is the common convention for earnest money, inspection, appraisal, financing, title review and disclosure deadlines. There is one deliberate exception. The final walkthrough is typically counted backward from the closing date, and it rolls backward too, to the previous business day rather than forward. Rolling a pre-closing item forward could push it past closing itself, which defeats the point of doing a walkthrough before you sign.

Does the day of acceptance count as day one?

No. The near-universal default is that the day after acceptance is day one, so a 10 day period lands 10 days after acceptance, not 9.

Do business days include Saturday?

No. A business day excludes both Saturday and Sunday, and any federal holiday that falls between the base date and the computed deadline.

Which direction does a rolled deadline move?

Nearly every deadline rolls forward to the next business day when it lands on a weekend or holiday, the final walkthrough is the one common exception and rolls backward, so it cannot land after closing.

Can a contract use business days for one period and calendar days for another?

Yes, and most standard forms do exactly that: earnest money is often a short business-day window, while inspection, appraisal and financing periods are more commonly calendar days. Check each period separately rather than assuming one basis applies to the whole contract.

None of this replaces reading the actual clause. Contracts are drafted by different associations in different states, and a form can define a period, a basis or a roll rule however its drafters chose. Treat every default above as the starting point a coordinator uses to sanity-check a date, not as a substitute for the printed language in front of you.