Spring is the time of year when the natural world is rejuvenated after the cold winter months. New plants start to grow and animals start to wake up during the spring.

The definition of spring is dependent on the sky. The angle of Earth's tilt toward the sun is what defines the spring. Between the spring equinox and the summer solstice is the period known as spring.

Day and night are almost equal during the year. Each year there are two equinoxes, one in the spring and one in the fall. The spring is in the Northern Hemisphere and in the Southern Hemisphere.

Spring is one of two times when the Earth's axis is not pointed toward or away from the sun. During the summer season in the Northern Hemisphere, the North Pole is at its greatest angle to the sun. The South Pole will be closer to the Southern Hemisphere around December 21.

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A diagram of the four seasons

A illustration of the Earth's position during four seasons. (Image credit: Getty Images)

In the Northern Hemisphere, the spring runs from March 21 to June 21 while in the Southern Hemisphere it runs from September 21 to December 21.

The air may lose its chill in the middle of March or September. The three-month meteorological spring period is based on rising temperatures. The meteorological spring in the north is in March, April and May, while in the south it is in September, October and November.

Spring awakening

Warming occurs in the hemisphere that is tilted closer to the sun. The ground, which may have been frozen over in the winter, is softer and more yielding to plants. Increased precipitation helps to water the infant seeds taking root in the ground.

The animals that traveled to warmer regions come out of their dens. In the spring, many animals give birth. Some animals may change their color to blend in with their new surroundings, because winter coats are shed by those that wear them.

The rising precipitation of spring may cause flooding as the snow is washed away. The warm air from the equator can combine with the still-cool air farther north or south to make for storms.

During the spring season in the United States, tornadoes are common. April 26, 1989, was the world's deadliest tornado. According to The Weather Channel, it left a mile wide path for 10 miles, killing 1,300 people and leaving 80,000 homeless.

The presence of tree buds is one of the first signs of spring. The buds of a plant act as a shield. Different shapes, sizes and forms of flowers are protected. During the winter, the buds remain closed and inactive, surviving the cold until their time comes to bloom in the spring. It is usually easy to distinguish a species from its flowers, but buds can have more subtle differences. The guide should help you identify the tree buds.

Here is how to identify them.

A time of celebration

The return of spring is celebrated by many cultures.

The annual blossom of cherry trees has become a national event in Japan. The Japan National Tourism Organization says that cherry blossom viewing is a time for festivals and gatherings at parks and shrines. The transience of life is a major theme in Buddhism.

Cherry blossom

The view of Mount Fuji, and cherry blossom trees from alongside Kawaguchi Lake, Japan.  (Image credit: Getty Images)

Passover commemorates the liberation of the Jewish people from slavery to Egypt. The day is on the first full moon after the northern spring equinox.

Easter is celebrated in many countries with a strong Christian tradition and commemorates the resurrection of Jesus Christ. It has roots in old traditions.

The Celts celebrated fertility and rebirth during the Celtic festival of Ostara, according to an anthropologist at a college in London.

Albania celebrates Dita e Verës on March 14, which is related to pagan roots. Prayers were offered to the Sun God on pilgrimages to the peaks of the Albanian mountains.

Mayday celebrations are common in Europe. In parts of Germany and the United Kingdom, the Maypole dance is a popular folk festival.

Additional resources

The California Academy of Science has a handy guide for more information about Earth's seasons. There are some rapid-fire facts about spring in the MET Office.

Bibliography

The National Weather Service explains why we have seasons.

The Met office is accessed in March 2022.

The Spring edition of Encyclopedia Britannica is available in March.

National Trust has 7 signs of spring everyone should know.