If you are looking for the "official" date to mark on your calendar, look to the . But if you’re waiting for the atmosphere to shift, keep an eye on the thermometer and the changing colors of the trees. Autumn is a season of transition, bridging the gap between the vibrancy of summer and the silence of winter.
Autumn usually begins on September 22 or 23 . In 2024, it falls on September 22; in 2025, it’s September 22. when is autum
Historically, autumn is the season of the harvest. This is why many cultures celebrate festivals like Thanksgiving or Mid-Autumn Festival during this period. If you are looking for the "official" date
For most of the world, autumn officially begins on the . This is the moment when the sun crosses the celestial equator, heading south. On this day, day and night are approximately equal in length. Autumn usually begins on September 22 or 23
| | Start Date | End Date | Best For... | | :--- | :--- | :--- | :--- | | Astronomical | Sept. 22-23 (varies) | Dec. 21 | Tradition, skywatching, solstice celebrations | | Meteorological | September 1 | November 30 | Weather records, climate statistics, heating bills | | Phenological | First leaf color / first frost | First permanent snow | Gardening, hunting, nature observation | | Cultural (US) | Labor Day (early Sept.) | Thanksgiving (late Nov.) | Retail, sports seasons, school calendars |
If you are looking for the "official" date to mark on your calendar, look to the . But if you’re waiting for the atmosphere to shift, keep an eye on the thermometer and the changing colors of the trees. Autumn is a season of transition, bridging the gap between the vibrancy of summer and the silence of winter.
Autumn usually begins on September 22 or 23 . In 2024, it falls on September 22; in 2025, it’s September 22.
Historically, autumn is the season of the harvest. This is why many cultures celebrate festivals like Thanksgiving or Mid-Autumn Festival during this period.
For most of the world, autumn officially begins on the . This is the moment when the sun crosses the celestial equator, heading south. On this day, day and night are approximately equal in length.
| | Start Date | End Date | Best For... | | :--- | :--- | :--- | :--- | | Astronomical | Sept. 22-23 (varies) | Dec. 21 | Tradition, skywatching, solstice celebrations | | Meteorological | September 1 | November 30 | Weather records, climate statistics, heating bills | | Phenological | First leaf color / first frost | First permanent snow | Gardening, hunting, nature observation | | Cultural (US) | Labor Day (early Sept.) | Thanksgiving (late Nov.) | Retail, sports seasons, school calendars |