Dec 9, 2025 · The fall equinox and the first day of autumn arrive on Tuesday, September 22, 2026, at 8:04 P.M. EDT in the Northern Hemisphere. The equinox occurs at the same moment worldwide.

Dec 31, 2025 · Astronomical fall starts with the autumnal equinox and ends the day before the winter solstice. Meteorological fall runs September 1 to November 30, helping track seasonal weather …

Jan 11, 2026 · Astronomically speaking, the first day of spring is marked by the spring equinox, which falls on March 19, 20, or 21. The equinox happens at the exact moment worldwide, although our …

Dec 24, 2025 · The first day of winter in the Northern Hemisphere is marked by the winter solstice, which occurs on Sunday, December 21, 2025, at 10:03 A.M. (EST). Use our Time Zone Converter to …

Dec 11, 2025 · Therefore, the summer solstice is not considered to be the first day of summer, meteorologically speaking. Astronomically, however, the first day of summer is said to be when the …

5 days ago · This is specifically the first Sunday following the Full Moon that occurs on or after the March or spring equinox. While Christmas is fixed to a solar calendar (and near the winter solstice), Easter …

1 day ago · See the average first and last frost dates for locations across the U.S. and Canada with our frost dates calculator. Simply enter your postal code to see when the last spring frost date and first …

2 days ago · When is the next full Moon? In our full Moon calendar, you'll find the dates, times, and traditional names of the monthly full Moons for this year and beyond. Enter your postal code to get …

Today, most Americans spring forward (turn clocks ahead and lose an hour) on the second Sunday in March (at 2:00 A.M.) and fall back (turn clocks back and gain an hour) on the first Sunday in …

Use our 2026 Frost Dates Calculator to find the average date of the last spring frost (and the first fall frost) in your area—based on the nearest official weather station and your ZIP or Postal Code.