As the nine nights represent the nine planets, we will be having a planetary observance of Navaratri with an account of one of the planets for each of the nine nights. The fifth day of Navratri is marked to worship Goddess Skandamata, mother of Murugan (var. Skanda, Subramanya, Kartikeya), is worshipped on the fifth day, one should wear yellow. This colour stands for happiness and brightness. Skanda-Murugan is the leader of the armies against evil.