Days Until Fall
Count down the days, hours, and minutes until the first day of fall (autumnal equinox). Free countdown calculator supporting Northern and Southern hemispheres.
About This Calculator
The Days Until Fall Calculator counts down to the first day of fall (also known as autumn), marked by the autumnal equinox. Whether you are planning seasonal activities, tracking foliage changes, or simply excited for cooler weather, this tool gives you the exact time remaining in days, hours, and minutes.
The calculator works by finding the next autumnal equinox based on your selected hemisphere. In the Northern Hemisphere, the autumnal equinox occurs around September 22-23 each year. In the Southern Hemisphere, it occurs around March 20-21. The date varies slightly because the Earth's orbit takes approximately 365.25 days, causing the equinox to shift by about 6 hours annually before being corrected by leap years. The calculator auto-detects your hemisphere from your browser timezone but allows manual override.
Regional Notes
Northern Hemisphere: Fall runs from the September equinox (September 22-23) to the December solstice (December 21-22). Countries including India, the United States, the United Kingdom, Canada, and most of Europe experience autumn during these months.
Southern Hemisphere: Fall runs from the March equinox (March 20-21) to the June solstice (June 21-22). Countries including Australia, New Zealand, South Africa, Argentina, and Chile experience autumn during these months.
This fall countdown also includes a breakdown table showing the time remaining in different units and two chart views: a bar chart comparing days, hours, and minutes, and a doughnut chart showing the proportion of the year until fall begins.
Frequently Asked Questions
How does the Days Until Fall calculator work?
The calculator counts down to the next autumnal equinox based on your selected hemisphere. Simply choose your hemisphere and start date, and it calculates the days, hours, and minutes until the first day of fall.
When does fall start in the Northern Hemisphere?
In the Northern Hemisphere, fall begins with the autumnal equinox around September 22-23 each year. The exact date varies slightly due to Earth's orbital mechanics and is corrected by leap years.
When does fall start in the Southern Hemisphere?
In the Southern Hemisphere, fall begins with the autumnal equinox around March 20-21 each year. This is the March equinox, when the Southern Hemisphere transitions from summer to autumn.
What is the autumnal equinox?
The autumnal equinox is the moment when the Sun crosses the celestial equator, resulting in nearly equal day and night (12 hours each) across the globe. It marks the astronomical beginning of fall.
Why does the date of fall change each year?
The date varies because Earth's orbit around the Sun takes approximately 365.25 days, causing the equinox to shift by about 6 hours each year before being corrected by leap year adjustments.
Can I calculate for both hemispheres?
Yes! The calculator includes a hemisphere selector that defaults to your timezone-based hemisphere but lets you manually switch between Northern and Southern hemispheres.
Is this calculator free?
Yes, the Days Until Fall calculator is completely free to use with no registration required. You can also share your countdown via the shareable URL.