11th January » William Herschel Timeline of discovery of Solar System planets and their moons discovers Titania (moon) Titania and Oberon (moon) Oberon, two Moons of Uranus moons of Uranus.
13th May » Captain (Royal Navy) e.g Captain Arthur Phillip leaves Portsmouth, England, with eleven ships full of convicts (the "First Fleet") to establish a penal colony in Australia.
14th May » In Philadelphia, delegates convene a Constitutional Convention (United States) known as Constitutional Convention to write a new United States Constitution called Constitution for the United States; George Washington presides.
20th June » Oliver Ellsworth moves at the Federal Convention to call the government the United States.
13th July » The Continental Congress enacts the Northwest Ordinance establishing governing rules for the Northwest Territory. It also establishes procedures for the admission of new states and limits the expansion of Slavery in the United States e.g slavery.
6th August » Sixty proof sheets of the United States Constitution Constitution of the United States are delivered to the Constitutional Convention (United States) Constitutional Convention in Philadelphia Philadelphia, Pennsylvania.
17th September » The United States Constitution is signed in Philadelphia.
28th September » The newly completed United States Constitution is History of the United States Constitution voted on by the Congress of the United States U.S. Congress to be sent to the State legislature (United States) state legislatures for approval.
1st October » Russians under Alexander Suvorov defeat the Turks Battle of Kinburn (1787) called at Kinburn.
7th December » Delaware becomes the first state to ratify the United States Constitution.
12th December » Pennsylvania becomes the second state to ratify the United States Constitution, five days after Delaware became the first.
18th December » New Jersey becomes the third state to ratify the United States Constitution named U.S. Constitution.
Famous Birthdays in 1787
13th January » John Davis (Massachusetts governor) known as John Davis, American lawyer and politician, 14th Governor of Massachusetts (d. 1854)
12th February » Norbert Provencher, Canadian clergyman and missionary (d. 1853)
6th March » Joseph von Fraunhofer, German physicist (d. 1826)
10th March » Francisco de Paula Martínez de la Rosa y Berdejo, Spanish politician, Prime Minister of Spain (d. 1862)
10th March » William Etty, English painter (d. 1849)
11th March » Ivan Nabokov, Russian general (d. 1852)
13th April » John Robertson (congressman) e.g John Robertson, American lawyer and politician (d. 1873)
19th April » Deaf Smith, American soldier (d. 1837)
26th April » Ludwig Uhland, German poet, philologist, and historian (d. 1862)
7th May » Jacques Viger (1787–1858) known as Jacques Viger, Canadian archaeologist and politician, 1st mayor of Montreal (d. 1858)
4th June » Constant Prévost, French geologist (d. 1856)
24th August » James Weddell, Belgian-English sailor, hunter, and explorer (d. 1834)
5th September » François Sulpice Beudant, French mineralogist and geologist (d. 1850)
4th October » François Guizot, French historian and politician, 22nd Prime Minister of France (d. 1874)
18th November » Louis Daguerre, French physicist and photographer, developed the daguerreotype (d. 1851)
21st November » Samuel Cunard, Canadian businessman, founded the Cunard Line (d. 1865)
22nd November » Rasmus Rask, Danish linguist, philologist, and scholar (d. 1823)
25th November » Franz Xaver Gruber, Austrian organist and composer (d. 1863)
9th December » John Dobson (architect) named John Dobson, English architect, designed Eldon Square and Lilburn Tower (d. 1865)
10th December » Thomas Hopkins Gallaudet, American educator, founded the American School for the Deaf (d. 1851)
14th December » Maria Ludovika of Austria-Este (d. 1816)
16th December » Mary Russell Mitford, English author and playwright (d. 1855)
Famous Deaths in History for 1787
13th February » Roger Joseph Boscovich, Croatian physicist, astronomer, mathematician, and philosopher (b. 1711)
13th February » Charles Gravier, comte de Vergennes, French diplomat, Ministry of Foreign and European Affairs (France) called Foreign Minister of France (b. 1717)
1st April » Floyer Sydenham, English scholar and academic (b. 1710)
2nd April » Thomas Gage, English general and politician, Governor of the Province of Massachusetts Bay (b. 1719)
10th May » William Watson (scientist) known as William Watson, English physician and scientist (b. 1715)
28th May » Leopold Mozart, Austrian violinist, composer, and conductor (b. 1719)
19th June » Princess Sophie Hélène Béatrice of France (b. 1786)
20th June » Carl Friedrich Abel, German viol player and composer (b. 1723)