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January — days, dates and countdowns

January is the first month of the year and has 31 days. It opens with New Year's Day, sits in deep winter across the northern hemisphere and high summer in the southern, and carries more diary pressure per day than any other month.

Every day of January

January 2026 in numbers

A free day is a Saturday, a Sunday or a public holiday — one rule on every page of this site. Holidays shown for the United States; pick another country.

Holidays in January 2026

Holidays by country

40 of 250 countries · see them all

How to use January

Use this page to see the month laid out: which weekday each date falls on, where the public holidays land, and how many working days are left. If you are planning a return to work, a term start or a January deadline, the grid answers those in one look.

January's practical quirk is that it rarely gives you a full working month. The first days are holiday or half-holiday in most countries, and everyone you need a decision from is somewhere else. Count backwards from your deadline using the working-day view, not the calendar-day one.

What sits in the month

1 January — New Year's Day, a public holiday almost everywhere. The first working Monday — the real start of the business year for most offices. School terms — the northern spring term begins; in the southern hemisphere January is the long summer break.

Tax and financial dates — several countries place filing or payment deadlines in late January. The winter midpoint — days are lengthening in the north, but the coldest weather usually arrives after the solstice, not with it. January is the month everyone plans in and nobody finishes anything in. Plan accordingly.

The name and the calendar's edge

January takes its name from Janus, the Roman god shown with two faces, one looking back and one forward — a fitting patron for a month spent reviewing the old year and promising things about the new one. It has not always been the opening month; the year has started at other points in other systems, which is why the ninth through twelfth months carry names meaning seven through ten.

That history is not just trivia. It is why the calendar has odd seams in it — a February that is short, month names that no longer match their positions, and a leap-day patch bolted onto a month that was already the runt of the year.

Planning around a slow start

If January matters to your schedule, the useful moves are unglamorous: Identify the first day everyone you depend on is genuinely back, not the first day the office is technically open. Move any deadline that lands in the first week — it will slip regardless, so slip it deliberately.

Book anything requiring other people's diaries in the second half of the month. Front-load the paperwork with fixed external dates, since those do not care about your run-up. The month is 31 days long and behaves like about 20. Building the schedule on the real number saves an argument in February.

North and south, same month, different lives

It is worth remembering that January is not universally a cold indoor month. South of the equator it is peak summer: holidays, beaches, school out, offices thin. A deadline set in London for a team in Sydney or Buenos Aires lands in the middle of their August, in effect. If your work crosses hemispheres, January is the month where assuming a shared season causes the most avoidable friction.

Questions and answers

How many days does January have?
Thirty-one, every year. It is one of the seven months with 31 days, and unlike February its length never changes.
Why is January the first month?
It became the start of the Roman civil year and that convention carried into the calendar we use now. Other reckonings — fiscal, academic, religious — still begin at other points, which is why "the new year" means different dates to different institutions.
Which weekday does January start on?
It varies year to year, shifting forward by one day annually and by two after a leap year. The calendar grid on this page shows the current year's arrangement.
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