Winter Solstice 2026: Exact Time, Shortest Day and Why the Date Shifts

The winter solstice 2026 is on Monday, December 21, 2026, at 20:50 UTC, which is 3:50 p.m. Eastern Standard Time. It’s the shortest day and longest night of the year in the Northern Hemisphere, and the moment astronomical winter begins.

The solstice is an instant, not a whole day: it’s the moment Earth’s North Pole is tilted farthest from the sun. The calendar date you see depends on your time zone, and it slowly shifts from year to year. This guide gives the exact time in every US zone, explains what happens at the solstice and why the date moves between December 20 and 22, and covers the surprising timing of the earliest sunset and the view from the Southern Hemisphere.

Winter solstice 2026 in your time zone

In 2026 the solstice falls on December 21 everywhere in the Americas and Europe, but it’s already December 22 in Japan, East Asia and Australia. Convert to any other city with the time zone converter, or count down with days until winter.

What happens at the solstice

Earth’s axis is tilted about 23.5 degrees, and the tilt points the same way in space all year. In June the Northern Hemisphere leans toward the sun; in December it leans away. At the December solstice, according to the National Weather Service:

• The sun is directly overhead at the Tropic of Capricorn, 23.5 degrees south of the equator.
• North of the equator, the sun reaches its lowest noon height of the year, and that height barely changes for several days on either side. “Solstice” comes from the Latin for “sun standing still.”
• It is the shortest day and longest night of the year in the Northern Hemisphere. After it, days slowly get longer again.

Why the date shifts between December 20 and 22

A calendar year has 365 days, but the time from one December solstice to the next is about a quarter of a day longer. So each year the solstice arrives roughly six hours later on the clock, until a leap day pulls it back:

Two things stand out. In 2027 the solstice is on December 22 in UTC but still December 21 in the US. And after the leap day in February 2028, it jumps back to the morning of December 21. Over decades, the Gregorian leap-year rule makes the solstice creep earlier: by our calculations the last December 22 solstice (UTC) this century is in 2043, the first December 20 in US Eastern time is in 2052, and the first December 20 in UTC is in 2080. Because 2100 is not a leap year, the date then moves later again.

The earliest sunset isn’t on the solstice

The solstice has the least daylight, but it doesn’t have the earliest sunset or the latest sunrise. The National Weather Service explains that at around 40 degrees north, roughly the latitude of Philadelphia, Denver and Indianapolis, the earliest sunsets come in early December and the latest sunrises around the start of January. The cause is the combination of Earth’s tilt and its slightly elliptical orbit.

In practice, evenings start getting lighter a couple of weeks before the solstice, while mornings keep getting darker until early January.

Astronomical vs. meteorological winter

There are two common definitions of when winter starts:

• Astronomical winter begins at the solstice, December 21, 2026, and ends at the March equinox, Saturday, March 20, 2027, at 4:24 p.m. EDT. That makes winter 2026–27 89 days long.
• Meteorological winter is simply December, January and February, the three coldest months on average. Forecasters and climatologists use it because full months make statistics easier to compare, as NOAA explains.

Count down to the end of winter with days until spring.

The solstice in the Southern Hemisphere

South of the equator, the December solstice is the summer solstice: the longest day of the year in Sydney, Buenos Aires and Cape Town, and the start of astronomical summer. Their winter solstice comes in June. The next one is Monday, June 21, 2027, at 14:10 UTC.

The sky around the solstice

The December full moon, often called the Cold Moon, comes two days after the 2026 solstice: the moon is full at 8:28 p.m. EST on Wednesday, December 23. The new moon before it is on Tuesday, December 8, at 7:52 p.m. EST, so the darkest skies of the month fall in the second week of December. See every phase on the 2026 moon phase calendar, or check tonight’s moon phase.

The solstice also lands in a busy week. It’s the day after the fourth Sunday of Advent and four days before Christmas; see our Advent 2026 guide for the season’s dates.

Frequently asked questions

When is the winter solstice 2026?

Monday, December 21, 2026, at 20:50 UTC, which is 3:50 p.m. EST and 12:50 p.m. PST.

Is December 21 the shortest day of the year?

In the Northern Hemisphere, yes, in 2026. The solstice day has the least daylight, though the earliest sunset comes a couple of weeks before it.

Do the days get longer after the winter solstice?

Yes. Daylight increases a little each day from the December solstice until the June solstice, which in 2027 is on Monday, June 21.

Is the winter solstice always on December 21?

No. Depending on the year and your time zone it can be December 20, 21 or 22. In 2027 it is December 22 in UTC but December 21 in the US.

When does winter end in 2027?

Astronomical winter ends at the March equinox, Saturday, March 20, 2027, at 4:24 p.m. EDT.