Wikipedia:Selected anniversaries/January 20

January 20: The Remembrance of Muharram in Shi'a Islam begins (2007, A.H. 1428).

• 1265 - Summoned by Simon de Montfort, the first English parliament held its first meeting in the Palace of Westminster.

• 1320 - After reuniting Poland, Władysław the Short (pictured) was crowned king in Kraków.

• 1885 - LaMarcus Adna Thompson patented the roller coaster.

• 1892 - The first official basketball game was played at the YMCA in Springfield, Massachusetts.

• 1942 - Nazis at the Wannsee conference in Berlin decided the "final solution to the Jewish question", accelerating the Holocaust.

Recent days: January 19 – January 18 – January 17

More anniversaries:

• December 31
• January 1
• January 2