The Days of the week are named for the ancient gods/planets. There are 5 planets visible to the naked eye from the earth, plus the sun and the moon, that make up the pantheon of 7: Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn. You can see some interesting pictures of the candlestick symbol in this blog post
Just thought that you may want to participate in the Human Rights Logo Competition. I-st Prize: 5000 EU Deadline : July 31 2011 It looks like one of those insane competitions in 99designs, but why not give it a try ? :))And by the way – the design, featured here is a personal favorite of mine. It’s done by Robert Eisermann Tokyo , Japan a.k.a. kawawa .