1999

Clockwise from top-left: the funeral procession of King Hussein of Jordan in Amman; an earthquake in İzmit kills over 17,000 people in Turkey; the Columbine High School massacre, one of the first major school shootings in the United States; the year 2000 problem ("Y2K"), perceived as a major concern in the lead-up to the year 2000; the Millennium Dome (currently The O2 Arena) opens in London; online music downloading platform Napster is launched, soon a source of online piracy; NASA loses both the Mars Climate Orbiter and the Mars Polar Lander; a destroyed T-55 tank near Prizren during the Kosovo War.
Millennium: 2nd millennium
Centuries:
Decades:
Years:
1999 in various calendars
Gregorian calendar1999
MCMXCIX
Ab urbe condita2752
Armenian calendar1448
ԹՎ ՌՆԽԸ
Assyrian calendar6749
Baháʼí calendar155–156
Balinese saka calendar1920–1921
Bengali calendar1406
Berber calendar2949
British Regnal year47 Eliz. 2 – 48 Eliz. 2
Buddhist calendar2543
Burmese calendar1361
Byzantine calendar7507–7508
Chinese calendar戊寅年 (Earth Tiger)
4696 or 4489
    — to —
己卯年 (Earth Rabbit)
4697 or 4490
Coptic calendar1715–1716
Discordian calendar3165
Ethiopian calendar1991–1992
Hebrew calendar5759–5760
Hindu calendars
 - Vikram Samvat2055–2056
 - Shaka Samvat1920–1921
 - Kali Yuga5099–5100
Holocene calendar11999
Igbo calendar999–1000
Iranian calendar1377–1378
Islamic calendar1419–1420
Japanese calendarHeisei 11
(平成11年)
Javanese calendar1931–1932
Juche calendar88
Julian calendarGregorian minus 13 days
Korean calendar4332
Minguo calendarROC 88
民國88年
Nanakshahi calendar531
Thai solar calendar2542
Tibetan calendar阳土虎年
(male Earth-Tiger)
2125 or 1744 or 972
    — to —
阴土兔年
(female Earth-Rabbit)
2126 or 1745 or 973
Unix time915148800 – 946684799

1999 (MCMXCIX) was a common year starting on Friday of the Gregorian calendar, the 1999th year of the Common Era (CE) and Anno Domini (AD) designations, the 999th year of the 2nd millennium, the 99th year of the 20th century, and the 10th and last year of the 1990s decade.

1999 was designated as the International Year of Older Persons.