On the morning of the historic same-sex marriage arguments in the U.S. Supreme Court, Michigan special assistant attorney general John Bursch, who is defending his state’s marriage ban, will don his trademark bow tie, walk into the ground level of the court building and rub the toe of the bronze statue of Chief Justice John Marshall for luck.

His opponent, Mary Bonauto of Gay & Lesbian Advocates & Defenders, will awaken that day on what has traditionally been what she considers her luckiest day of the week—Tuesday (which is one reason she always prefers to fly on that day). Tuesday was also the day on which she won the Massachusetts Supreme Judicial Court’s 2003 decision legalizing same-sex marriage in that state.