Nine Czech students are executed as a response to anti-Nazi demonstrations prompted by the death of Jan Opletal. All Czech universities are shut down and more than 1,200 students sent to concentration camps. Since this event, International Students' Day is celebrated in many countries, especially in the Czech Republic.

The Czechs, or the Czech people, are a West Slavic ethnic group and a nation native to the Czech Republic in Central Europe, who share a common ancestry, culture, history, and the Czech language.

The Protectorate of Bohemia and Moravia was a partially-annexed territory of Nazi Germany that was established on 16 March 1939 after the German occupation of the Czech lands. The protectorate's population was mostly ethnic Czechs.

Jan Opletal was a student of the Medical Faculty of the Charles University in Prague, who was shot at a Czechoslovak Independence Day rally on 28 October 1939. He was severely injured at this anti-Nazi demonstration against the German occupation of Czechoslovakia and died two weeks later.

A concentration camp is a prison or other facility used for the internment of political prisoners or politically targeted demographics, such as members of national or ethnic minority groups, on the grounds of national security, or for exploitation or punishment.

International Students' Day is an international observance of the student community, held annually on 17 November. Originally commemorating the Czech universities which were stormed by Nazis in 1939 and the students who were subsequently killed and sent to concentration camps, it is now marked by a number of universities, sometimes on a day other than 17 November, as a nonpolitical celebration of the multiculturalism of their international students.