2015 (MMXV) was a common year starting on Thursday of the Gregorian calendar, the 2015th year of the Common Era (CE) and Anno Domini (AD) designations, the 15th year of the 3rd millennium and the 21st century, and the 6th year of the 2010s decade.

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2015 in various calendars
Gregorian calendar2015
Ab urbe condita2768
Armenian calendar1464
Assyrian calendar6765
Baháʼí calendar171–172
Balinese saka calendar1936–1937
Bengali calendar1422
Berber calendar2965
British Regnal year63 Eliz. 2  64 Eliz. 2
Buddhist calendar2559
Burmese calendar1377
Byzantine calendar7523–7524
Chinese calendar甲午年 (Wood Horse)
4711 or 4651
乙未年 (Wood Goat)
4712 or 4652
Coptic calendar1731–1732
Discordian calendar3181
Ethiopian calendar2007–2008
Hebrew calendar5775–5776
Hindu calendars
 - Vikram Samvat2071–2072
 - Shaka Samvat1936–1937
 - Kali Yuga5115–5116
Holocene calendar12015
Igbo calendar1015–1016
Iranian calendar1393–1394
Islamic calendar1436–1437
Japanese calendarHeisei 27
Javanese calendar1948–1949
Juche calendar104
Julian calendarGregorian minus 13 days
Korean calendar4348
Minguo calendarROC 104
Nanakshahi calendar547
Thai solar calendar2558
Tibetan calendar阳木马年
(male Wood-Horse)
2141 or 1760 or 988
(female Wood-Goat)
2142 or 1761 or 989
Unix time1420070400 – 1451606399
From top left, clockwise: Civil service in remembrance of November 2015 Paris attacks; Germanwings Flight 9525 was purposely crashed into the French Alps; the rubble of residences in Kathmandu following the April 2015 Nepal earthquake; World Leaders pose for a picture during the 2015 Paris Agreement; an airstrike in Sana'a during the Saudi Arabian–led intervention in Yemen; Refugees of the Syrian civil war come ashore in Greece; FIFA president Sepp Blatter is forced to resign in disgrace in the wake of the 2015 FIFA corruption case; New Horizons makes a flyby and takes the first images of Pluto.

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Millennium: 3rd millennium

2015 was designated by the United Nations as: