For 10 points, name this spring holiday where a pole is erected.
In 1919, Charles Ruthenberg was involved in a Cleveland riot on this holiday. This holiday was traditionally the date on which tenants in New York City would switch residences. Yale graduates like Phillip Dean and Gordon Sterrett prepare for the Gamma Psi dance in New York City in an F. Scott Fitzgerald story named for this holiday. This day is officially (*) Loyalty Day in the United States, while in Germany the eve of this holiday is celebrated as Walpurgis Night. Fertility ceremonies are held in England on this day, which is also celebrated as International Workers' Day. For 10 points, name this spring holiday where a pole is erected.
In 1919, Charles Ruthenberg was involved in a Cleveland riot on this holiday.
May Day [accept International Workers' Day or Loyalty Day before mentioned]