Millennium:	2nd millennium
Centuries:	17th century 18th century 19th century
Decades:	1700s 1710s 1720s 1730s 1740s
Years:	1724 1725 1726 1727 1728 1729 1730

1727 by topic
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1727 in various calendars
Gregorian calendar	1727 MDCCXXVII
Ab urbe condita	2480
Armenian calendar	1176 ԹՎ ՌՃՀԶ
Assyrian calendar	6477
Balinese saka calendar	1648–1649
Bengali calendar	1134
Berber calendar	2677
British Regnal year	13 Geo. 1 – 1 Geo. 2
Buddhist calendar	2271
Burmese calendar	1089
Byzantine calendar	7235–7236
Chinese calendar	丙午年 (Fire Horse) 4424 or 4217 — to — 丁未年 (Fire Goat) 4425 or 4218
Coptic calendar	1443–1444
Discordian calendar	2893
Ethiopian calendar	1719–1720
Hebrew calendar	5487–5488
Hindu calendars
- Vikram Samvat	1783–1784
- Shaka Samvat	1648–1649
- Kali Yuga	4827–4828
Holocene calendar	11727
Igbo calendar	727–728
Iranian calendar	1105–1106
Islamic calendar	1139–1140
Japanese calendar	Kyōhō 12 (享保１２年)
Javanese calendar	1651–1652
Julian calendar	Gregorian minus 11 days
Korean calendar	4060
Minguo calendar	185 before ROC 民前185年
Nanakshahi calendar	259
Thai solar calendar	2269–2270
Tibetan calendar	阳火马年 (male Fire-Horse) 1853 or 1472 or 700 — to — 阴火羊年 (female Fire-Goat) 1854 or 1473 or 701

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1727 (MDCCXXVII) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1727th year of the Common Era (CE) and Anno Domini (AD) designations, the 727th year of the 2nd millennium, the 27th year of the 18th century, and the 8th year of the 1720s decade. As of the start of 1727, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.

Events

January–March

January 1 – (December 21, 1726 O.S.) Spain's ambassador to Great Britain demands that the British return Gibraltar after accusing Britain of violating the terms of the 1713 Treaty of Utrecht. Britain refuses and the Thirteenth Siege of Gibraltar begins on February 22.
January 6 – Martin Spanberg and two other members of the First Kamchatka expedition arrive in Okhotsk, after a journey from Saint Petersburg of almost two years. After the end of winter, the 63-member group, commanded by Vitus Bering, proceeds to the Kamchatka River, to prepare for exploration of the Arctic.
January 9 – The world-famous Charité Hospital is established in Berlin, to be used for research and to help the poor. Prussia's King Frederick William I had ordered the conversion of a 16-year old institution, originally built in anticipation of an epidemic of the bubonic plague.
January 12 – Abd el-Sayed of Egypt is enthroned, as Pope John XVII of Alexandria becomes the leader of the Coptic Christian Church, as the 105th Pope of Alexandria and Patriarch of the Holy See of St. Mark. He will serve until his death on April 20, 1745.
February – The First Saudi State is founded by Muhammad bin Saud.
February 2 – Johann Sebastian Bach's solo cantata, Ich habe genug, BWV 82, premieres in Leipzig.
February 20 – German composer George Frideric Handel becomes a British subject.^[1]
February 22 (February 11, 1726 O.S.) – Spain besieges the British-held territory of Gibraltar, in order to recapture it. ^[1] Britain's Royal Navy begins a blockade of Spanish ports and the unsuccessful siege ends with the signing of a truce on June 24.
March 4 – Battle of Halidzor in Armenia: A small group of defenders overcomes a much larger Ottoman Empire army.
March 9 – The west African Kingdom of Dahomey, ruled by King Trudo Agaja, conquers and annexes the Kingdom of Xwéda, after King Haffon is killed in battle (three years earlier, Agaja conquered the neighboring state of Allada).
March 22 – After 55 years as Sultan of Morocco, Ismail Ibn Sharif dies at the age of 81, prompting a 30-year battle between seven of his sons, for succession to the throne.

April–June

April 11 – Johann Sebastian Bach's St Matthew Passion (BWV 244b) premieres at St. Thomas Church, Leipzig.
May 12 – History of the Moravian Church: The 18th century renewal: The Brotherly Agreement is adopted by the Moravian Church community at Herrnhut, under the influence of Count Nicolaus Zinzendorf, beginning the Church's renewal.
May 31 – The Royal Bank of Scotland is founded by Royal Charter in Edinburgh.^[2]
June 22 (July 11 Old Style) – George, Prince of Wales, becomes King George II of Great Britain, on the death of his father.^[2]
June 23 – Spain ceases hostilities after its attempt to recapture Gibraltar from Britain fails. A truce is signed the next day. ^[1]
June 27 – Uxbridge, Massachusetts, is incorporated as a town.

July–September

July 1 – In India, Shuja-ud-Din Muhammad Khan becomes the new Nawab of Bengal after the death of his father-in-law, Murshid Quli Khan. At the time, Bengal consists of what is now the nation of Bangladesh and the southeast Indian state of West Bengal and is subservient to the Mughal Empire.
July 23 – Seventeen Ursuline Sisters from France land in New Orleans, in the Louisiana territory of New France, after a journey that began on February 22.^[3] They later create the orphanage which is the predecessor of Catholic Charities and the Ursuline Academy, the oldest Catholic school in the United States.
August 13 – History of the Moravian Church: The 18th century renewal: The Moravian Church community at Herrnhut undergoes a Pentecostalist experience.
August 14 – Elections for the House of Commons begin in Great Britain and continue until October 17.
August 30 – Anne, eldest daughter of King George II of Great Britain, is given the title Princess Royal.
September 8 – A barn fire during a puppet show in the village of Burwell, Cambridgeshire, England, kills 78 people, many of them children. Another report says that all but six of the 160 persons assembled were killed in the accidental fire.^[4]

October–December

October 11 – George II of Great Britain is crowned. Handel's Coronation Anthems are composed for the event, including Zadok the Priest, which has been played at every subsequent Coronation of the British monarch.^[1]
October 17 – With voting for the British House of Commons concluding, the Whigs, led by Sir Robert Walpole, increase their supermajority, winning 415 of the 558 seats. The Tories share of Commons decreases from 169 to 128.
November 18 – Tabriz earthquake, Persia kills 77,000.
November 21 – The Netherlands signs the Treaty of Seville.
November 27 – The foundation stone of the Jerusalem's Church in Berlin is laid.
December 8 – For the first time since the union of England and Scotland into Great Britain, the Royal Bank of Scotland, which still retains the right to print currency, issues its first pound note, printing paper currency for twenty shillings. The Scottish pound note continues to be printed until 2001 and the smallest denomination now is a five pound note.
December 17 – The London Evening Post, a conservative newspaper, publishes its first issue. It continues in regular publication for 70 years.

Date unknown

An old woman known as Janet (Jenny) Horne of Loth, Sutherland becomes the last alleged witch in the British Isles to be executed, when she is burned at the stake in Dornoch, Scotland.^[5]^[6] (Some sources give the date as June 1722.)^[7]
The first Amish move to North America.
1727–1800 – Lt. Col. Francisco de Mello Palheta smuggles coffee seeds to Brazil in a bouquet, starting a coffee empire.