Srinagar, March 29 -- Spring is the season during which the natural world revives and reinvigorates after the colder winter months and during it dormant plants begin to grow again, new seedlings sprout out of the ground and hibernating animals awake.

What most people call spring relies on the astronomical definition of the word. Defined by the angle of Earth's tilt toward the sun, astronomical spring relies on equinoxes and solstices to define it. Spring is generally considered the period between the spring equinox and the summer solstice.

Equinoxes are days during the year when day and night are almost equal. There are two equinoxes each calendar year, one in the spring and one in the fall. The spring, or vernal, equinox occurs around ...