In a Roman context, ‘son of god’ referred to the emperor of Rome. After Julius Caesar’s death he was deified by the Roman senate and was dubbed Divi Iulius or ‘the divine Julius.’ As such, his adopted successor, Octavian, upon his death and during his lifetime as emperor was called ‘Divi Filius’ or ‘son of god.’ Octavian’s adopted son Tiberius received the same honorary title. Under the Roman Empire, the emperor was literally worshiped as a god. In Jewish contexts, the ‘son of god’ refers to the king of Israel. In 2 Samuel 7:14 God relays that the new king of Israel will be his son and he will become his father.
In US graduation ceremonies, the side on which the tassel hangs can be important. Sometimes it is consistent among all students throughout the ceremony, in other cases it differs based on level of study with undergraduate students wearing the tassel on the right, and graduate student wearing them on the left.