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|Centuries:||17th century – 18th century – 19th century|
|Decades:||1690s 1700s 1710s – 1720s – 1730s 1740s 1750s|
|Years:||1725 1726 1727 – 1728 – 1729 1730 1731|
|1728 by topic:|
|Arts and Sciences|
|Archaeology – Architecture – Art – Literature (Poetry) – Music – Science|
|Canada –Denmark – France – Great Britain – Ireland – Norway – Scotland –Sweden –|
|Lists of leaders|
|Colonial governors – State leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Ab urbe condita||2481|
|British Regnal year||1 Geo. 2 – 2 Geo. 2|
|Chinese calendar||丁未年 (Fire Goat)
4424 or 4364
— to —
戊申年 (Earth Monkey)
4425 or 4365
|- Vikram Samvat||1784–1785|
|- Shaka Samvat||1650–1651|
|- Kali Yuga||4829–4830|
|Japanese calendar||Kyōhō 13
|Julian calendar||Gregorian minus 11 days|
|Minguo calendar||184 before ROC
|Thai solar calendar||2270–2271|
|Wikimedia Commons has media related to 1728.|
1728 (MDCCXXVIII) was a leap year starting on Thursday (dominical letter DC) of the Gregorian calendar and a leap year starting on Monday (dominical letter GF) of the Julian calendar, the 1728th year of the Common Era (CE) and Anno Domini (AD) designations, the 728th year of the 2nd millennium, the 28th year of the 18th century, and the 9th year of the 1720s decade. Note that the Julian day for 1728 is 11 calendar days difference, which continued to be used from 1582 until the complete conversion of the Gregorian calendar was entirely done in 1929.
- February 28 – At the Battle of Palkhed, Maratha Peshwa Bajirao I defeats the Mughal Governor of Deccan, Qamar-ud-din Khan, Asif Jah I, Nizam-ul-Mulk.
- March 14 – Jean-Jacques Rousseau leaves Geneva for the first time.
- May 31 – The Royal Bank of Scotland extends the first overdraft (to Edinburgh merchant William Hogg for £1,000).
- July 14–August 14 – Vitus Bering sails northward from the Kamchatka Peninsula, through the Bering Strait, and round Cape Dezhnev.
- Late Summer – Voltaire ends his exile in England.
- August 29 – City of Nuuk founded in Greenland as fort Godt-Haab by royal governor Claus Paarss.
- October 20–23 – The Copenhagen Fire of 1728 (the largest in the city's history) burns.
- The English astronomer James Bradley uses stellar aberration (first observed in 1725) to calculate the speed of light and observes nutation of the Earth's axis.
- The Real y Pontificia Universidad de San Gerónimo de la Habana, the oldest university in Cuba, is founded in Havana.
- Frederick, Prince of Wales, son of King George II of Great Britain, arrives in Britain for the first time, aged 21.
- January 9 – Thomas Warton, English poet (d. 1790)
- February 3 – Charles Rainsford, British General (d. 1809)
- February 21 – Emperor Peter III of Russia, husband of Catherine the Great (d. 1762)
- February 25 – John Wood, the Younger, English architect (d. 1782)
- April 16 – Joseph Black, Scottish physicist and chemist (d. 1799)
- August 26 – Johann Heinrich Lambert, Swiss mathematician, physicist and astronomer (d. 1777)
- August 28 – John Stark, American Revolutionary War general (d. 1822)
- September 3 – Matthew Boulton, English manufacturer and lifelong key partner of James Watt (d. 1809)
- September 14 – Mercy Otis Warren, American playwright (d. 1814)
- October 5 – Chevalier d'Eon, French diplomat, spy, soldier and transvestite (d. 1810)
- October 7 – Caesar Rodney, American lawyer and signer of the Declaration of Independence (d. 1784)
- October 27 – James Cook, British naval commander and explorer (d. 1779)
- November 10 – Oliver Goldsmith, Irish writer (d. 1774)
- December 28 – Justus Claproth, German jurist and inventor of the deinking process of recycled paper (d. 1805)
- February 12 – Agostino Steffani, Italian diplomat and composer (b. 1654)
- February 13 – Cotton Mather, New England Puritan minister (b. 1663)
- March 4 – Grand Duchess Anna Petrovna of Russia, eldest daughter of Peter the Great (b. 1708)
- April 3 – James Anderson, Scottish historian (b. 1662)
- May 14 – Louise Marie d'Orléans, Mademoiselle, French princess (b.1726)
- August 15 – Marin Marais, French viol player and composer (b. 1656)
- August 26 – Anne Marie d'Orléans Queen consort of Sicily and Sardinia (b.1669)
- September 23 – Christian Thomasius, German jurist (b. 1655)
- November 19 – Leopold, Prince of Anhalt-Köthen, German Prince (b. 1694)
- Serfoji I, third Raja of the Bhonsle dynasty (b. 1675)