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.
The Moon doesn't produce its own light. What you generally see when you look at the Moon is the brightness of the surface of the Moon lit by the Sun in the Moon's daytime. Next time you see the Moon in its very thin crescent phase, look carefully and you will see the whole Moon but the part that's not the bright crescent is very dim, but not black.