Wikipedia:Selected anniversaries/March 18

March 18: Mothering Sunday in the United Kingdom and Laetare Sunday in Western Christianity (2007); Flag Day in Aruba (1976).

Voskhod 2 patch

• 1229 - Sixth Crusade: Holy Roman Emperor Frederick II declared himself King of Jerusalem.

• 1438 - Albert II of Habsburg became King of the Romans in the Holy Roman Empire.

• 1921 - The Polish-Soviet War, which determined the borders between the Republic of Poland and Soviet Russia, formally concluded with the signing of the Peace of Riga.

• 1922 - Mahatma Gandhi was sentenced to six years in prison for civil disobedience.

• 1965 - Cosmonaut Aleksei Leonov donned a spacesuit and ventured outside the Voskhod 2 spacecraft (mission insignia shown), becoming the first person to walk in space.

Recent days: March 17 – March 16 – March 15

More anniversaries:

• February 29
• March 1
• March 2