- 1st
- 2015: Paying for sex in Northern Ireland became illegal by the Human Trafficking and Exploitation (Criminal Justice and Support for Victims) Act (Northern Ireland) 2015 coming into force.
- 2nd
- 1975: Occupation of Saint-Nizier church by Lyon prostitutes. The event is commemorated annually on 2 June as International Whores' Day.
- 4th
- 1998: The Swedish Riksdag passed The Kvinnofrid law, which criminalised the buying of sex.
- 9th
- 1849: Death of Phoebe Doty, an American prostitute and madam who owned several brothels in New York.
- 15th
- 1943: Birth of Xaviera Hollander, a Dutch call girl, madam, and author, best known for her best-selling memoir The Happy Hooker: My Own Story.
- 25th
- 1910: The United States introduced the Mann Act, which made it a felony to engage in interstate or foreign commerce transport of "any woman or girl for the purpose of prostitution or debauchery, or for any other immoral purpose"
- 28th
