Millennium: 2nd millennium
1990 in various calendars
Gregorian calendar1990
Ab urbe condita2743
Armenian calendar1439
Assyrian calendar6740
Bahá'í calendar146–147
Balinese saka calendar1911–1912
Bengali calendar1397
Berber calendar2940
British Regnal year38 Eliz. 2 – 39 Eliz. 2
Buddhist calendar2534
Burmese calendar1352
Byzantine calendar7498–7499
Chinese calendar己巳(Earth Snake)
4686 or 4626
    — to —
庚午年 (Metal Horse)
4687 or 4627
Coptic calendar1706–1707
Discordian calendar3156
Ethiopian calendar1982–1983
Hebrew calendar5750–5751
Hindu calendars
 - Vikram Samvat2046–2047
 - Shaka Samvat1911–1912
 - Kali Yuga5090–5091
Holocene calendar11990
Igbo calendar990–991
Iranian calendar1368–1369
Islamic calendar1410–1411
Japanese calendarHeisei 2
Javanese calendar1922–1923
Juche calendar79
Julian calendarGregorian minus 13 days
Korean calendar4323
Minguo calendarROC 79
Nanakshahi calendar522
Thai solar calendar2533
Tibetan calendar阴土蛇年
(female Earth-Snake)
2116 or 1735 or 963
    — to —
(male Iron-Horse)
2117 or 1736 or 964
Unix time631152000 – 662687999

1990 (MCMXC) was a common year starting on Monday of the Gregorian calendar, the 1990th year of the Common Era (CE) and Anno Domini (AD) designations, the 990th year of the 2nd millennium, the 90th year of the 20th century, and the 1st year of the 1990s decade.

Important events of 1990 include the Reunification of Germany and the unification of Yemen,[1] the formal beginning of the Human Genome Project (finished in 2003), the launch of the Hubble Space Telescope, the separation of Namibia from South Africa, and the Baltic states declaring independence from the Soviet Union amidst Perestroika. Yugoslavia's communist regime collapses amidst increasing internal tensions and multiparty elections held within its constituent republics result in separatist governments being elected in most of the republics marking the beginning of the breakup of Yugoslavia. Also in this year began the crisis that would lead to the Gulf War in 1991 following the Iraq invasion and the largely internationally unrecognized annexation of Kuwait. This annexation resulted in a crisis in the Persian Gulf involving the issue of the sovereignty of Kuwait and fears by Saudi Arabia over Iraqi aggression against their oil fields near Kuwait. This led to Operation Desert Shield being enacted with an international coalition of military forces being built up on the Kuwaiti-Saudi border with demands for Iraq to peacefully withdraw from Kuwait. Also in this year, Nelson Mandela was released from prison, and Margaret Thatcher resigned as Prime Minister of the United Kingdom after more than 11 years.

1990 was an important year in the Internet's early history. In the fall of 1990, Tim Berners-Lee created the first web server and the foundation for the World Wide Web. Test operations began around December 20 and it was released outside CERN the following year.[2] 1990 also saw the official decommissioning of the ARPANET, a forerunner of the Internet system and the introduction of the first content web search engine, Archie, on September 10.[3]

September 14, 1990 saw the first case of successful somatic gene therapy on a patient.[4]

Due to the early 1990s recession that began that year and uncertainty due to the collapse of the socialist governments in Eastern Europe, birth rates in many countries stopped rising or fell steeply in 1990. In most western countries the Echo Boom peaked in 1990; fertility rates declined thereafter.[5]

Encyclopædia Britannica, which ceased printing in 2012, saw its highest all time sales in 1990; 120,000 volumes were sold that year.[6] The number of librarians in the United States also peaked around 1990.[7]



January 7: The Pisa tower closed.
January 29: Trial relating to Exxon Valdez.


ADtranz low floor tram GT6N in Berlin