How many days until December 31?

How the December 31 count works

This page counts the full days that begin tomorrow up to Thursday, December 31, 2026. Today is Wednesday, November 4, 2026, and it does not count, which makes the answer 57 days.

If December 31 is already over this year, the tool counts to the next one. On the morning of the date it declares it is the date, and one day on, it begins counting to the following year.

The weekly, monthly and business day figures are worked out from the same dates. A business day is any weekday from Monday to Friday, and the hours figure runs from midnight at the start of today.

The hours count starts at midnight at the start of today to the midnight before December 31. The sleeps figure mirrors the day count, since each sleep is a night.

Lots of people seek the days left to December 31 to plan a party. The figure on this page updates daily.

Planning around December 31

A fixed date is easier to plan around as soon as you know its weekday. In 2026 it lands on a Thursday, and the weekday tiles show how it moves from one year to the next.

The table of day gaps from 30 to 100 serves deadlines counted in set blocks. Notice periods, free trials and payment terms are often set to those lengths, so we list the dates before and after it.

The dates around December 31 each have their own page. Step to the day before or after and check the difference.

Leap years add February 29. A countdown that spans it counts one more day, and the maths is done for you.

A date that is a weekend day can shift payment dates, since most offices and banks are shut on those days.

About the date

December 31 comes as the 365th day of 2026, with 0 days left after it. It sits in Week 53 of 2026, in the ISO calendar, where weeks start on Monday.

December 31 carries the sign Capricorn, and the birthstones tied to December are turquoise, tanzanite and zircon. They rest on tradition, not science, and sources can differ by a day on the dates.

If you are waiting for a birthday, fill in the year you were born above. It shows the age you reach on the next December 31.

Leave this page open and the count adjusts in your own time zone, so it stays correct through the midnight change. The share button will share the countdown to someone else.

Dates, weekdays and the calendar

A calendar day ends up on a different weekday in each new year. A normal year is 52 weeks and a day over, so the weekday moves forward by one, or two after a leap year.

For that reason the ten year table helps before you make a booking. A date that is a Saturday this year may turn up on a Monday in two years, so the plan changes as well.