December solstice (Northern Hemisphere winter solstice)2026 · Date · History
The U.S. Naval Observatory calculates the December 2026 solstice for December 21 at 20:50 Universal Time. USNO explains that solstices mark the beginning of summer and winter and that seasonal naming is hemisphere-dependent: the same December solstice is the Northern Hemisphere winter solstice and the Southern Hemisphere summer solstice. The exact instant is target-year specific and must be refreshed for other years.
About December solstice (Northern Hemisphere winter solstice)
The December solstice is the astronomical solstice that occurs in December. In the Northern Hemisphere it marks the start of astronomical winter; in the Southern Hemisphere it marks the start of astronomical summer.
For 2026, the U.S. Naval Observatory gives the solstice instant as December 21 at 20:50 Universal Time (UT). Local clock time can differ by time zone.
Why December solstice (Northern Hemisphere winter solstice) matters
A solstice is an astronomical event tied to Earth’s seasonal cycle, not a single all-day moment that happens at the same local clock time everywhere.
Calling the December event the “winter solstice” is hemisphere-specific. That label is correct for the Northern Hemisphere, while the Southern Hemisphere experiences its summer solstice at the same instant.
History of December solstice (Northern Hemisphere winter solstice)
The U.S. Naval Observatory provides calculated equinox and solstice times across a long year range through its Earth’s Seasons service.
For the 2026 December solstice, USNO lists December 21 at 20:50 UT. The exact instant changes from year to year.
What the evidence establishes
Confirmed institutional roles and milestones are shown first. Details that could not be established from the reviewed sources are listed separately below.
8 fields not established in reviewed sources
Also known as
Winter Solstice
How to Observe December solstice (Northern Hemisphere winter solstice)
Use an authoritative astronomy source to convert the solstice instant into your local time zone.
Observe seasonal daylight changes safely; never look directly at the Sun without appropriate solar-viewing protection.
Keep astronomical facts separate from cultural, spiritual or wellness traditions unless those traditions are independently sourced and clearly identified as such.
December solstice (Northern Hemisphere winter solstice) Facts
The 2026 December solstice occurs on December 21 at 20:50 UT according to the U.S. Naval Observatory.
It is the Northern Hemisphere winter solstice and the Southern Hemisphere summer solstice.
Solstice times are precise instants and can fall at different local dates or clock times depending on time zone.
The target-year instant should be refreshed rather than copied forward unchanged.
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
- Confirm the date again before carrying it into a new year.
Evidence & sources
Sources used across the guide are gathered here. Labels show how each source supports the page, and contextual references are kept separate from primary evidence.
U.S. Naval Observatory — Earth seasons 2026 (opens in a new tab)
Astronomical Authority Current Edition
U.S. Naval Observatory — Earth’s Seasons data service (opens in a new tab)
Astronomical Authority Method And Context
Understand it, compare it, then explore further
Start with the most common factual questions, then compare closely related observances and explore useful connections.
Frequently asked questions
When is December solstice (Northern Hemisphere winter solstice)?
21 December 2026 at 20:50 UT The documented recurrence rule is: Refresh the authoritative target-year edition/schedule; current stored evidence: 21 December 2026 at 20:50 UT.
Does December solstice (Northern Hemisphere winter solstice) fall on the same date every year?
Not automatically. This date is specific to a particular edition and should be confirmed for another year.
Is December solstice (Northern Hemisphere winter solstice) an official public holiday?
The reviewed sources verify it within this scope: Global astronomical December solstice / Northern Hemisphere winter-solstice naming; target-year instant is edition-specific. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when reliable evidence explicitly does so.
Who established or recognizes December solstice (Northern Hemisphere winter solstice)?
The documented basis is: The U.S. Naval Observatory calculates the December 2026 solstice for December 21 at 20:50 Universal Time. USNO explains that solstices mark the beginning of summer and winter and that seasonal naming is hemisphere-dependent: the same December solstice is the Northern Hemisphere winter solstice and the Southern Hemisphere summer solstice. The exact instant is target-year specific and must be refreshed for other years.. Supporting evidence includes U.S. Naval Observatory — Earth seasons 2026. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is December solstice (Northern Hemisphere winter solstice) international or country-specific?
The documented scope is international or global: Global astronomical December solstice / Northern Hemisphere winter-solstice naming; target-year instant is edition-specific. That does not mean every country treats the date as a public holiday or observes it in the same way.
How is this page verified?
The factual information is checked against reviewed sources, including the date pattern, scope and institutional history. This page was checked on 2026-10-04.
When is the December solstice in 2026?
The U.S. Naval Observatory gives December 21, 2026 at 20:50 UT.
Is the December solstice winter everywhere?
No. It is winter in the Northern Hemisphere and summer in the Southern Hemisphere.
Why can the local time be different?
USNO’s quoted instant is in Universal Time; local civil time depends on the location’s time-zone offset.
Does the solstice happen for a whole day?
Astronomically, the solstice is a specific instant, though people often refer to the surrounding calendar day as the solstice day.
Can I reuse the 2026 time for another year?
No. The exact solstice instant changes from year to year and should be recalculated or checked against an authoritative astronomy source.
Other observances on December 21
These observances are also listed on December 21, 2026.
Chester Greenwood Day
Maine law designates 21 December each year as Chester Greenwood Day, directs the governor to issue an annual proclamation, and traces the section to Public Law 1977, chapter 262.
National Coquito Day
Don Q Rum announced National Coquito Day as an annual December 21 observance and described the 2018 formalization of the day.
National Maine Day
National Day Calendar lists its private National Maine Day on December 21 and describes the National State Days series as beginning in 2017. Maine separately designates March 15 as Statehoo…
World Basketball Day
A/RES/77/324
World Meditation Day
A/RES/79/137