Wikipedia:Selected anniversaries/April 19
April 19: Passover begins at sunset (Judaism, 2008); Feast of Saint Alphege (Western Christianity)
- 1713 – With no living male heirs, Holy Roman Emperor Charles VI issued the Pragmatic Sanction to ensure one of his daughters would inherit the Habsburg monarchy.
- 1775 – The American Revolutionary War began with the Battles of Lexington and Concord in Middlesex County, Massachusetts.
- 1943 – Nazi German troops entered the Warsaw Ghetto to round up the remaining Jews (pictured), sparking the Warsaw Ghetto Uprising, the first mass uprising in Poland against the Nazi occupation during the Holocaust.
- 1971 – The first space station, Salyut 1, was launched from the Baikonur Cosmodrome near Tyuratam, Kazakh SSR, USSR.
- 1984 – Scottish-born composer Peter Dodds McCormick's "Advance Australia Fair", a patriotic song that was first performed in 1878, officially replaced "God Save the Queen" as Australia's national anthem.
- 1995 – A car bomb was detonated in front of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, USA, killing 168 people and injuring over 800 others.