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Millennium: 2nd millennium
1720 in various calendars
Gregorian calendar1720
Ab urbe condita2473
Armenian calendar1169
Assyrian calendar6470
Balinese saka calendar1641–1642
Bengali calendar1127
Berber calendar2670
British Regnal yearGeo. 1 – 7 Geo. 1
Buddhist calendar2264
Burmese calendar1082
Byzantine calendar7228–7229
Chinese calendar己亥(Earth Pig)
4416 or 4356
    — to —
庚子年 (Metal Rat)
4417 or 4357
Coptic calendar1436–1437
Discordian calendar2886
Ethiopian calendar1712–1713
Hebrew calendar5480–5481
Hindu calendars
 - Vikram Samvat1776–1777
 - Shaka Samvat1641–1642
 - Kali Yuga4820–4821
Holocene calendar11720
Igbo calendar720–721
Iranian calendar1098–1099
Islamic calendar1132–1133
Japanese calendarKyōhō 5
Javanese calendar1644–1645
Julian calendarGregorian minus 11 days
Korean calendar4053
Minguo calendar192 before ROC
Nanakshahi calendar252
Thai solar calendar2262–2263
Tibetan calendar阴土猪年
(female Earth-Pig)
1846 or 1465 or 693
    — to —
(male Iron-Rat)
1847 or 1466 or 694

1720 (MDCCXX) was a leap year starting on Monday of the Gregorian calendar and a leap year starting on Friday of the Julian calendar, the 1720th year of the Common Era (CE) and Anno Domini (AD) designations, the 720th year of the 2nd millennium, the 20th year of the 18th century, and the 1st year of the 1720s decade. As of the start of 1720, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.




  • July 12 – "Bubble Act": the Lords Justice in Great Britain attempt to curb some of the excesses of the stock markets during the "South Sea Bubble". They dissolve a number of petitions for patents and charters, and abolish more than 80 joint-stock companies of dubious merit, but this has little effect on the creation of "Bubbles", ephemeral joint-stock companies created during the hysteria of the times.[2]
  • July 27 – The Battle of Grengam takes place in the Ledsund strait between the island communities of Föglö and Lemland. It was the last major naval battle in the Great Northern War that took place in the Åland Islands, marking the end of Russian and Swedish offensive naval operations in Baltic waters.
  • August 14 – The Spanish Villasur expedition, which set out on June 16 from New Mexico, with the intention of checking French influence on the Great Plains of North America, ends in failure, as it is ambushed by a Pawnee and Otoe force.
  • September – "South Sea Bubble": The English stock market crashes, with dropping prices for stock in the South Sea Company.
  • November 16 – Pirate "Calico Jack" Rackham is brought to trial at Spanish Town in Jamaica; he is hanged at Port Royal two days later.

Date unknown




  1. Williams, Hywel (2005). Cassell's Chronology of World History. London: Weidenfeld & Nicolson. pp. 297–298. ISBN 0-304-35730-8.
  2. MacKay, Charles (2003). Extraordinary Popular Delusions and the Madness of Crowds. Harriman House Classics.