August the 21st is the Festival Of Consus/Consualia. a festival, with games, in honor of Consus, the god of secret deliberations. This festival is associated with the "Rape of the Sabine Women." When after the building of Rome the Romans had no women, it is said, and when their suit to obtain them from the neighboring tribes was rejected, Romulus spread a report, that he had found the altar of an unknown god buried under the earth. The god was called Consus, and Romulus vowed sacrifices and a festival to him, if he succeeded in the plan he devised to obtain wives for his Romans. According to legend, it was at the first celebration of the Consualian Games that the Sabine maidens were carried off. The purpose being to populate the newly built town of Rome.
Consus was eventually identified with Neptunus Equester, the alias and counterpart of Poseidon Hippios (Neptune), who was the founder of Atlantis, where, according to Plato, horses (hippos, equus) originated. Hence the connection with the animal. It was solemnized every year in the circus, by the symbolical ceremony of uncovering an altar dedicated to the god, which was buried in the earth. This was because Romulus, who was considered the founder of the festival, was said to have discovered an altar in the earth on that spot. Consus was also known as the protector of grains and storage bins, which among the Romans were subterranean silos. He was represented by a grain seed. Since the grain was stored in holes underneath the earth, Consus' altar was also placed beneath the earth (near the Circus Maximus). It was uncovered only during the Consualia, his festival on August 21 and December 15.
The solemnity took place on the 21st of Augusta with horse and chariot races, and libations were poured into the flames which consumed the sacrifices. During these festive games, horses and mules were not allowed to do any work, and were adorned with garlands of flowers. One of the main events during this festival was a mule race (the mule was his sacred animal). Also on this day, farm and dray horses were not permitted to work and attended the festivities.