The Earth’s axis is at right angles to the line from sun to Earth, the sun is directly over the equator and the lengths of ...

The spring equinox marks the start of astronomical spring. The date is determined by the Earth's tilt on its axis as it ...

However, this system was fixed over 2,000 years ago. Since then, an astronomical phenomenon called the precession of the equinoxes has slightly altered the orientation of the Earth in relation to ...

Typically, the first day of spring falls between March 19 and 21, depending on when the spring equinox occurs. The first day of meteorological spring took place on Saturday, March 1.