The Aries Moon squares Mercury in Cancer on Tuesday. Mercury in your sign squares off with the Aries Moon. As the Aries Moon squares Mercury in Cancer, spend some time alone. As the Aries Moon squares Mercury in Cancer, you may say something harsh without thinking. AdvertisementPisces (February 19 - March 20)Design: YourTangoWhen the Aries Moon squares Mercury in Cancer on August 4, your heart and mind are pulling you in two different directions.