June 19 is the 170th day of the year of the Gregorian calendar, 171st when it is a leap year, then there are 195 left.
Its equivalent was usually the 1st Messidor of the French Republican/Revolutionary calendar, officially referred to as Rye Day.
It is also a possible but exceptional date for the summer solstice in the northern hemisphere and the winter solstice in the southern hemisphere, and then the respective beginning of summer or winter in each of said two hemispheres. , with the most frequent dates being June 20, 21 and 22.
June 18 - June 19 - June 20
936: coronation of Louis IV d'Outremer as King of France.
1097: end of the siege of Nicaea and capture of the city from the Seljuk Turks by the Crusaders during the first crusade.
1157: Battle of Lake Mèron, defeat of the Templars, whose Grand Master, Bertrand de Blanquefort, is taken prisoner by Nur ad-Din.
1299: by the treaty of Montreuil-sur-Mer, which restores peace between France, the County of Flanders and England, the Frenchman Philippe IV le Bel returns Guyenne to his great vassal the King of England Edward I, but retains the city of Bordeaux.
1306: English victory at the Battle of Methven during the First War of Scottish Independence.
1369: Philippe II the Bold, Duke of Burgundy, brother of the King of France Charles V, marries Marguerite III of Flanders, heiress of the Count of Flanders Louis de Male.
1525: the prisoner King of France François I is landed in Barcelona, under royal escort, to spend the rest of his captivity in the very Spain of his rival and host Charles V, towards the villa of Venyssolo, near Valence. Throughout this transfer, from June 22 to 28, the passages of the miracle-working king François in Spain will prove to be triumphant!
1541: the wedding festivities of Guillaume de Clèves with the niece of the same king of France, Jeanne d'Albret, finally come to an end, after eleven days, including their high point, the wedding itself, on June 14, in Chatellerault. This very diplomatically calculated marriage, refused by the very young wife, will be canceled later.
1669: Michał Wiśniowiecki is elected King of Poland.
1790: abolition of many rights of the nobility and the clergy in France.
1799: Battle of Trebbia.
1800: the French army, commanded by Moreau, defeats the Austrians at the Battle of Höchstädt.
1816: Battle of La Grenouillère, between the Hudson's Bay Company and the North West Company.
1847: signing of the Jarnac Convention between France and the United Kingdom.
1850: marriage of Charles XV and Louise of the Netherlands.
1864: naval battle, between the southern corvette CSS Alabama, and the northern frigate USS Kearsarge, off Cherbourg (Cherbourg-en-Cotentin since 2016). The CSS Alabama is sunk.
1865: the abolition of slavery is announced in Texas. This day is commemorated as Juneteenth.
1867: Maximilian I of Mexico is shot in Querétaro.
1913: entry into force of the Natives Land Act, in the Union of South Africa.
1934: The United States Congress passes the Communications Act, which creates the Federal Communications Commission.
1937: the city of Bilbao (Basque Country, Spain) falls into the hands of the Francoists, during the Battle of Bilbao.
1940: German troops discover, at Charité-sur-Loire, an abandoned train carrying the secret archives of the French headquarters.
1953: execution of Julius Rosenberg, and his wife Ethel Rosenberg, accused of spying for the benefit of the USSR.
1956: execution, in Algiers, of the first members of the FLN sentenced to death.
1960: visit of the American president