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When is First Day of Winter 2026?
First Day of Winter 2026 is on Monday, December 21, 2026 — that's 218 days (31 weeks) from today.
Below you'll find the exact date, the day of the week, a live countdown, and everything you need to plan ahead — plus a free iPhone widget that keeps First Day of Winter on your home screen.
218
days
First Day of Winter
Outside
Free iPhone app with home screen widgets. Used by 300k+ people.
Date details for First Day of Winter 2026
- Day of week: Monday
- Full date: Monday, December 21, 2026
- Days remaining: 218
- Weeks remaining: 31
First Day of Winter 2026 is on Monday, December 21, 2026. That is 218 days away — about 31 weeks and 1 day, or roughly 7 months, from today. First Day of Winter is an astronomical season that begins at a solstice or equinox, the precise moment Earth's tilt reaches a turning point. Because First Day of Winter falls on a Monday, it joins the Saturday and Sunday before it to create a natural three-day weekend.
Counting down turns a vague "soon" into a clear number of days you can plan around — booking travel, sending cards, or simply building anticipation. Many people begin preparing for a date like this two to three months ahead, and a visible countdown helps pace that preparation rather than leaving everything to the final week. If you are counting down to First Day of Winter, you can add a free Outside countdown widget to your iPhone home screen; it updates every day and can be shared with friends and family.
Looking for First Day of Winter 2027?
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Find out when First Day of Winter 2026 is. Count down the days and set a reminder.
History & Significance
Mark your calendar for First Day of Winter 2026. Use a countdown and reminders to stay on track.
The Science Behind First Day of Winter
Seasons are driven by the tilt of Earth's axis — roughly 23.5 degrees — not by how close the planet is to the Sun. As Earth orbits, each hemisphere leans toward or away from the Sun, changing the angle of sunlight and the length of the day. The astronomical start of a season is pinned to a solstice or an equinox, the precise moment that geometry reaches a turning point.
That is why the start of First Day of Winter 2026 lands on a specific date and even a specific time, rather than the first of a month. Equinoxes bring near-equal day and night worldwide; solstices mark the longest or shortest day of the year. Knowing the exact changeover is useful for gardeners, photographers, and anyone tracking daylight hours.
First Day of Winter 2026: Frequently Asked Questions
When is First Day of Winter 2026?
First Day of Winter 2026 is on Monday, Monday, December 21, 2026 — 218 days from today. You can track it with a free countdown widget on your iPhone home screen using the Outside app.
What day of the week is First Day of Winter 2026?
First Day of Winter 2026 falls on a Monday. Knowing the weekday helps you plan time off, travel, or weekend activities around the date.
How long until First Day of Winter 2026?
First Day of Winter 2026 is 31 weeks away — roughly 8 months from now. That's plenty of time to plan ahead.
Is there a free First Day of Winter countdown app?
Yes. Outside is a free iPhone app with a First Day of Winter countdown widget for your home screen, plus reminder alerts and calendar sync. Used by 300k+ people.
What causes First Day of Winter to begin?
First Day of Winter begins because of the 23.5-degree tilt of Earth's axis. As the planet orbits the Sun, each hemisphere leans toward or away from it, changing sunlight and day length. The season's astronomical start is pinned to a solstice or equinox.
Is the start of First Day of Winter the same date every year?
Not exactly. Because the solstice and equinox follow Earth's orbit rather than the calendar, the start of First Day of Winter can shift by a day or two from year to year. 2026 has its own precise changeover date and time.
What is the difference between meteorological and astronomical First Day of Winter?
Meteorological seasons are fixed three-month blocks used by forecasters, while astronomical seasons are defined by solstices and equinoxes. The date counted here is the astronomical start of First Day of Winter 2026.
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