When Is the First Day of Fall 2024 and 2025? - timeanddate.com
According to the astronomical definition, fall begins with the autumnal equinox. In the Northern Hemisphere, it's the September equinox; south of the equator, it is the equinox in March. What is an equinox? Equinoxes and solstices in your city. Autumn Equinox, Northern Hemisphere (September) North America, Europe, most of Asia, Northern Africa.
Autumnal equinox | Definition, Dates, & Facts | Britannica
Autumnal equinox, two moments in the year when the Sun is exactly above the Equator and day and night are of equal length; also, either of the two points in the sky where the ecliptic (the Sun’s annual pathway) and the celestial equator intersect.
Fall Equinox 2024 ‑ Date, Rituals & Meaning - HISTORY
Sep 18, 2017 · The fall equinox is the first day of autumn in the Northern Hemisphere. Arriving between September 21 and 24, the day has spawned rituals in many cultures.
When is the First Day of Fall? Autumnal Equinox 2024
Sep 23, 2024 · In 2024, the autumnal (fall) equinox arrives on Sunday, September 22, marking the official first day of fall. Here's everything you should know about the fall equinox—plus our favorite fall facts, folklore, photos, and more!
What Is the Equinox? And What Is the Solstice? - timeanddate.com
The September equinox occurs sometime between September 21 and 24. In the Northern Hemisphere, the March equinox is also known as the spring or vernal equinox; the September equinox can be called the fall or autumnal equinox. In the Southern Hemisphere, the names are the other way around.
Fall equinox 2024: When it is, why it happens and what to ...
Sep 15, 2024 · The fall equinox is an important way to mark Earth's annual journey around the sun. The hours of darkness will gradually increase north of the equator until the solstice on Dec. 21, and vice...
Autumn equinox is the first day of fall. How is that ... - NPR
Sep 22, 2022 · Fall starts at 9 p.m. ET Thursday, a day officially known as the autumn equinox. Both equinoxes and solstices only happen twice a year — the first days of fall and spring are equinoxes,...
Equinoxes explained: Everything you need to know about the ...
Sep 17, 2024 · The start of fall and spring is determined by an astronomical phenomenon called an equinox, when the sun is positioned exactly above Earth's equator. Jose Daniel Castro-Cisneros, a physics graduate student, explains how equinoxes work.
Autumnal Equinox and Other Sky Events: What You Need to Know
Sep 20, 2016 · What is an Equinox? Just twice a year, day and night fall into perfect balance. Some claim that astronomical phenomenon, called equinox, inspires ancient structures to reveal hidden secrets.
The Vernal equinox (the first day of spring) occurred on March 19th at 9:06 pm MDT and the Autumnal Equinox (the first day of fall) will occur on September 22nd at 6:43 am MDT. The word equinox is derived from two Latin words - aequus (equal) and nox (night).