When do spring, summer, fall, and also winter start and also end? It counts on which definition you use and also if you space north or south of the equator.

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The four seasons space spring, summer, fall (autumn), and winter.

The 4 Seasons

The Earth"s axis is contempt tilted in relation to its orbit around the Sun. This is why we have actually seasons.

How precisely do periods work?

In many cultures, including all west countries, the year is generally divided into 4 seasons:

SpringSummerFall or AutumnWinter

Since the year has 12 months, every season lasts about three months. However, the days when the seasons begin and also end vary depending upon whom friend ask. Two methods are most commonly used to define the dates of the seasons: the astronomical definition and also the meteorological definition.

Astronomical terms & definitions

Earth: The living planet

Astronomical Seasons

The astronomical definition uses the dates of equinoxes and solstices to mark the beginning and also end that the seasons:

What room equinoxes and solstices?

The beginning of every season clues the finish of the last.

Because the timings that the equinoxes and solstices adjust each year, the length of huge seasons in ~ a year and between years additionally vary.

Equinoxes and also solstices dates worldwide

Meteorological Seasons

According to the meteorological definition, the seasons begin on the first day of the month that encompass the equinoxes and also solstices. In the north Hemisphere, for example,

spring operation from March1 come May31;summer runs from June1 come August31;fall (autumn) runs from September1 come November30; and

Opposite political parties – the contrary Seasons



When the northern Hemisphere gets most sunlight (summer), the southerly Hemisphere gets least (winter).

Seasons in the southern Hemisphere space opposite come those in the northern Hemisphere. Because that example, under the an interpretation of expensive seasons, the June solstice clues the begin of summer in the north Hemisphere, but it is the begin of winter in the southerly Hemisphere. The same rule uses for the other seasons.

The meteorological seasons in the southern Hemisphere are likewise opposite come those in the northern Hemisphere:

spring beginning September 1 and ends November 30;fall (autumn) starts march 1 and ends may 31; andwinter beginning June 1 and ends respectable 31;

The Sun: Our home star

Different Countries, different Seasons

The concern which definition to usage divides countries and also regions approximately the world. Because that example, Australia and new Zealand usage the meteorological definition, therefore spring begins on September1 every year. In plenty of other countries, both meanings are used, depending upon the context.

In Ireland, St Brigid"s work on February1 is regularly thought to note the start of feather in the old Celtic calendar system. Part cultures, specifically those in south Asia have actually calendars that division the year right into six seasons, rather of the four that most of us are familiar with.

In Finland and Sweden, the days of the seasons are not based on the calendar in ~ all, yet on temperatures. This method that the periods within every county start and end on different dates, depending on the regions and their climate.

See more: What Time Does The Sun Rise On The West Coast, Sunrise And Sunset In Australia

In Iceland, the very first day the summer, a nationwide holiday, drops on the first Thursday ~ April 18.