The vernal equinox occurs on March 20 or 21 and the autumnal equinox on September 22 or 23, marking the beginning of spring and autumn, respectively, in the Northern Hemisphere (and the reverse in the Southern Hemisphere). The days on which an equinox falls have about equal periods of sunlight and darkness.
The name Greenland comes from Scandinavian settlers. In the Norse sagas, it is said that Erik the Red was exiled from Iceland for murder. He set out in ships to find land rumoured to be to the northwest. After settling there, he named the land Grfnland (Greenland), possibly to attract more people to settle there.