Cross-Border Deadlines: Canadian and US Holiday Differences

For a cross-border deadline, start by identifying the calendar that governs each obligation. A Canadian calculation uses the province or territory selected in the calculator. The other party being in the United States does not add US holidays to that count.

That can still leave a practical question: will the US office be open on a day that the Canadian calculation counts? US federal holidays apply to federal employees and the District of Columbia. A private organization may use another schedule. Canadian employment entitlements also vary by federal, provincial and territorial jurisdiction. A project or agreement may add its own closures.

Some 2026 dates have different status on each side

Date	Canadian calendar	US federal calendar
Monday 18 May	Victoria Day	Ordinary federal working day
Monday 25 May	Ordinary day in all Canadian calendars	Memorial Day
Monday 12 October	Canadian Thanksgiving	Columbus Day
Wednesday 11 November	Remembrance Day in the federal calendar and some provinces	Veterans Day
Thursday 26 November	Ordinary day in Canadian public-holiday calendars	Thanksgiving Day
Friday 25 December	Christmas Day	Christmas Day
Saturday 26 December	Boxing Day in the federal calendar and Ontario holiday legislation	Ordinary day in the US federal calendar

Canadian Thanksgiving and the US federal Columbus Day holiday fall on the same date in 2026: Monday 12 October. They have different names and legal bases, and a private US workplace may still be open.

Both countries observe Labour Day on Monday 7 September 2026. New Year's Day and Christmas Day also share dates, although substitute days and workplace arrangements can differ.

An Ontario calculation does not exclude US Thanksgiving

Count five Ontario working days from Friday 20 November 2026, excluding the start date:

Date	Ontario count
Monday 23 November	Day 1
Tuesday 24 November	Day 2
Wednesday 25 November	Day 3
Thursday 26 November	Day 4
Friday 27 November	Day 5

The calculator returns Friday 27 November 2026. Open the Ontario example.

US Thanksgiving, on Thursday 26 November, is Day 4 because it is not an Ontario public holiday. That can be the correct result for an Ontario deadline even if the US counterparty is unavailable. Check the US calendar or that party's closure schedule separately.

Boxing Day is another difference to record

Boxing Day is one of the ten general holidays for federally regulated Canadian employees. Ontario's Employment Standards Act, 2000 also lists it as a public holiday. Provincial treatment varies, and substitute-holiday arrangements depend on the employment regime and work schedule.

The US Office of Personnel Management's 2026 federal schedule has no Boxing Day holiday. As 26 December falls on a Saturday, a Canadian substitute day or an employer's year-end closure may be more relevant than the date itself.

State the calendar for each obligation

An agreement can use separate calendars for separate obligations. For example, a delivery date may use Ontario public holidays while a response period uses the counterparty's US office calendar. State the country and province, territory or state used for public holidays, whether weekends are excluded, and any named office or year-end closures. The wording also needs to say what happens when an end date falls on an excluded day.

Those details are inputs to a calculation, not a standard drafting formula. Where an agreement already defines "business day", use that definition. Where the wording is disputed or incomplete, the calculator cannot resolve its legal effect.

The Canada Working Day Calculator covers the Canadian side. It does not include US federal or state holiday calendars. For a timetable that depends on both organizations, calculate the Canadian date and check the relevant US and private-office dates separately.