Never miss an important date
What Day Is First Day of Winter 2026?
First Day of Winter 2026 falls on a Monday — Monday, December 21, 2026. That's 218 days away.
Knowing the day of the week makes it easy to plan time off, travel, or weekend activities. Add a free countdown widget on your iPhone to keep First Day of Winter in view.
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
- Date: Monday, December 21, 2026
- Days remaining: 218
- Weeks remaining: 31
First Day of Winter 2026 falls on a Monday — Monday, December 21, 2026. That is 218 days away, or about 31 weeks and 7 months. 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?
More ways to track First Day of Winter
Turn this date into a shared plan, a home screen habit, or a deeper browse session through related countdown pages.
Share First Day of Winter with friends
Give everyone the same countdown, reminders, and widgets so the date stays visible for the whole group.
Open page →Put First Day of Winter on your lock screen
Keep the countdown one glance away with a lock screen widget that updates automatically every day.
Open page →Browse Seasonal Countdowns
Open a hub of related countdown pages so you can keep exploring the strongest cluster around this event.
Open page →About First Day of Winter
The first day of Winter 2026 is Monday, December 21st.
History & Significance
This date marks the Winter Solstice in the Northern Hemisphere, the shortest day of the year.
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
What day is First Day of Winter 2026?
First Day of Winter 2026 falls on Monday, Monday, December 21, 2026. That is 218 days (about 31 weeks) from today.
What day of the week is First Day of Winter 2026?
First Day of Winter 2026 is on a Monday. Falling on a Monday, it sets up a natural three-day weekend. Mark your calendar for Monday, December 21, 2026.
Is First Day of Winter 2026 on a weekday or weekend?
First Day of Winter 2026 falls on a Monday, which is a weekday. Knowing this early helps you plan time off, travel, or gatherings around the date.
When is First Day of Winter 2026?
First Day of Winter 2026 is on Monday, Monday, December 21, 2026 — 218 days away. Add a free countdown widget on your iPhone with the Outside app to keep the date in view.
How many days until First Day of Winter 2026?
There are 218 days until First Day of Winter 2026 on Monday, Monday, December 21, 2026 — approximately 31 weeks from now.
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.
More Event Days
Find out what day other events fall on.
Home Screen Widgets
Beautiful countdown widgets that sit right on your home screen.
Lock Screen Widgets
See your countdown without even unlocking your phone.
Live Activities
Real-time countdown updates on your Dynamic Island.