Luís Montenegro

• In Portugal, the Democratic Alliance (leader Luís Montenegro pictured) wins the most seats in a snap legislative election.
• At the Academy Awards, Oppenheimer wins seven awards, including Best Picture.
• Japanese manga artist Akira Toriyama, author of Dragon Ball, dies at the age of 68.
• Sweden becomes the thirty-second member state of NATO.

March 17: Saint Patrick's Day (Christianity); Anniversary of the Unification of Italy (1861)

Dorchester Heights Monument

• 1864 – Second Schleswig War: In an attempt to end a Danish blockade, Eduard von Jachmann led a Prussian squadron in an attack against a Danish fleet led by Edvard van Dockum.
• 1902 – The Dorchester Heights Monument (pictured), memorializing the siege of Boston during the American Revolutionary War, was dedicated.
• 1957 – A plane crash on the slopes of Mount Manunggal killed Philippine president Ramon Magsaysay and 24 others.
• 1979 – The Penmanshiel Tunnel in the Scottish Borders region of Scotland collapsed during refurbishing construction, killing two workers, and leading to the abandonment of the tunnel.
• 2004 – Unrest in Kosovo broke out, resulting in the deaths of 28, the wounding of more than 600 others, and the destruction of several Serb Orthodox churches and shrines.