As the rites of the Salii mimic the passage from peace to war and back to peace by moving between the two poles of Mars and Quirinus in the monthly cycle of March, so they do in the ceremonies of October, the "Equus October" ("October Horse") taking place on the Campus Martius the "Armilustrium", purification of the arms, on the Aventine, and the Tubilustrium on the 23rd. Other correspondences may be found in the dates of the founding of the temples of Mars on 1 June and of that of Quirinus on 29 June, in the pre-Julian calendar the last day of the month, implying that the opening of the month belonged to Mars and the closing to Quirinus.