International Women's Day first emerged from the activities of labour movements at the turn of the twentieth century in North America and across Europe. Since those early years, International Women's Day has assumed a new global dimension for women in developed and developing countries alike.
The shadowed portion is entirely hidden from view. The first quarter and third quarter moons (both often called a half moon), happen when the moon is at a 90 degree angle with respect to the earth and sun. So we are seeing exactly half of the moon illuminated and half in shadow.
You sometimes see a pale glow on the darkened portion (night side) of a crescent moon. This glow is due to light reflected from Earthâs day side. Itâs called earthshine. As the moon orbits Earth, it changes phase in an orderly way. Follow these links to understand the various phases of the moon.