12. When the sun is farthest north or south of the equator, the even is called solstice. When it is farthest to the north, it is called summer solstice and when it farthest to the south it is called winter solstice .
13. When neither hemisphere is tilted toward nor away form the sun, it is called equinox. At this time, daylight and night time is as long as each other, or they are both 12 hours long in both hemisphere.
