It is celebrated differently all over the world.
Spain- the planting season as the ground thaws and the daylight hours become longer so crops can grow
Scotland- Festival called Whuppity Scoorie. It involves local children running around a church swinging around paper balls on strings, before scrambling to pick up coins that are thrown down for them.
Indian -spring is the festival of Holi – also known as the festival of colors.
Christianity- Easter and the rebirth of Jesus.
Daylight Saving Time – which means there will be less sunlight in the morning and more in the evenings.
According to calender-updates.com,
In the US and the rest of the northern hemisphere, the first day of the spring season is the day of the year when the Sun crosses the celestial equator moving northward (on March 20th or 21st). This day is known as the Vernal Equinox.
A common misconception is that the earth is further from the sun in winter than in summer. Actually, the Earth is closest to the sun in December which is winter in the Northern hemisphere.