![]() ![]() According to this definition, each season begins on the first of a particular month and lasts for three months: Spring begins on March 1, summer on June 1, autumn on September 1, and winter on December 1. Climate scientists and meteorologists created this definition to make it easier to keep records of the weather, since the start of each meteorological season doesn’t change from year to year. In contrast, the meteorological start of a season is based on the annual temperature cycle and the 12-month calendar.A solstice is when the Sun reaches the most southerly or northerly point in the sky, while an equinox is when the Sun passes over Earth’s equator. Because of leap years, the dates of the equinoxes and solstices can shift by a day or two over time, causing the start dates of the seasons to shift, too. More specifically, the start of each season is marked by either a solstice (for winter and summer) or an equinox (for spring and autumn). The astronomical start of a season is based on the position of the Earth in relation to the Sun.Here is more explanation about how astronomers and meteorologists define seasons differently: Subtract 3 hours for Pacific time, 2 hours for Mountain time, 1 hour for Central time, and so on.įirst Day of Spring 2023: The Spring Equinox Note: The dates above correspond to the start of the listed seasons in the Northern Hemisphere. The First Days of the Seasons 2023 Seasons The meteorological start date is based on our 12-month civil calendar as well as the annual temperature cycle.The astronomical start date is based on the position of the Sun in relation to the Earth.It sounds complicated, but trust us, it’s not! Each season has both an astronomical start and a meteorological start. The dates when the seasons begin and end vary depending on whom you ask. Learn more about the four seasons (and guess which of the four seasons is shortest!). When do the four seasons of the year start-fall, winter, spring, summer? It depends on who you ask! Also, the dates of the equinoxes and solstices can change from year to year. ![]()
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