Equinox and solstice

The March equinox will happened on Friday,March 20 in 2015. The march equinox happens because it crosses the celestial equator heading northward.

The December solstice will be on Tuesday, December 22. The winter solstice is the shortest day and the longest night of the year.

The June solstice will be on June 21 in 2015. The June solstice occurs twice a year. This event occurs because the tilt of the planets axis is towards the sun.

The September equinox will happened on Wednesday,September 23 in 2015. The September equinox occurs because the sun crosses the celestial equator and heads southward.