The astronomical definition is likely the one you learned in school. It is based on the Earth’s 23.5-degree axial tilt and its 365-day journey around the sun. Seasons change when the Earth reaches four key points in its orbit: the two and the two equinoxes .
definition (based on Earth's position relative to the Sun) or the meteorological when do the four seasons start and end
Winter is the coldest and darkest season of the year. In the Northern Hemisphere: The astronomical definition is likely the one you
The four seasons - spring, summer, autumn (or fall), and winter - are a fundamental part of our yearly cycle. Each season brings its own unique characteristics, weather patterns, and activities. But when exactly do the four seasons start and end? definition (based on Earth's position relative to the
The timing of the seasons depends on whether you follow the calendar (based on Earth's position relative to the sun) or the meteorological calendar (based on temperature cycles). 📅 Astronomical Seasons (2026)
: Used by scientists for consistent record-keeping, these split the year into four 3-month periods that always start on the first day of a month. Northern Hemisphere