A Crescent Moon Kicks-Off Ramadan 2021 Then Skims Mars And Uranus: What You Can See In The Night Sky This Week Your stargazing highlights for the week ahead include the first sighting of a slim crescent Moon, which this week will signal the start of the Islamic festival of Ramadan. You can then see a waxing crescent Moon slide past Mars, the Pleiades (the Seven Sisters) and the Hyades—and the of Venus.