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.
There are two different types of shadows. The umbra blocks all sunlight and creates a dark cone shape surrounded by the penumbra, which is a funnel-shaped shadow that partially hides the sun. In a total solar eclipse, the moon casts its umbra on Earth and covers a third of it. In a partial eclipse, only part of the sun is blocked. An annular eclipse occurs when the sun creates a ring of light around the moon while it is at its farthest point.