Wikipedia:Selected anniversaries/May 13
May 13: World Fair Trade Day (2006), Rotuma Day in Fiji.
- 1848 - Maamme, the national anthem of Finland, was performed for the first time.
- 1888 - Isabel the Redeemer (pictured) signed the Lei Áurea into law, formally abolishing slavery in Brazil.
- 1917 - Our Lady of Fatima: Lúcia Santos and her cousins Jacinta and Francisco Marto witnessed their first Marian apparition near Fátima, Portugal.
- 1969 - The May 13 Incident: Chinese-Malay race riots left at least 184 people dead in Kuala Lumpur, Malaysia.
- 1981 - Mehmet Ali Ağca shot and critically wounded Pope John Paul II in Saint Peter's Square, Vatican City.