uiGallery

dates are from various sources, and may be wrong.

1998
• 1998 mar
  BeOS R3 is released(?)
  source: wikipedia
• 1998 jun
  BeOS R3.1 is released(?)
  source: wikipedia
• 1998 jul
  BeOS R3.2 is released(?)
  source: wikipedia
• 1998 nov 4
  BeOS R4 is released(?)
  source: wikipedia
1999
• 1999 jun
  BeOS R4.5 is released(?)
  source: wikipedia
2000
• 2000 mar 28
  BeOS R5 is released(?)
  source: wikipedia
2004
• 2004 oct 20
  ubuntu 4.10 (warty warthog) is released
  source: wikipedia
2005
• 2005 apr 8
  ubuntu 5.04 (hoary hedgehog) is released
  source: wikipedia
• 2005 oct 12
  ubuntu 5.10 (breezy badger) is released
  source: wikipedia
2006
• 2006 jun 1
  ubuntu 6.06 (dapper drake) is released
  source: wikipedia
• 2006 oct 26
  ubuntu 6.10 (edgy eft) is released
  source: wikipedia
2007
• 2007 apr 19
  ubuntu 7.04 (feisty fawn) is released
  source: wikipedia
• 2007 oct 18
  ubuntu 7.10 (gusty gibbon) is released
  source: wikipedia
2008
• 2008 apr 24
  ubuntu 8.04 (hardy heron) is released
  source: wikipedia
• 2008 oct 30
  ubuntu 8.10 (intrepid ibex) is released
  source: wikipedia
2009
• 2009 apr 23
  ubuntu 9.04 (jaunty jackalope) is released
  source: wikipedia
• 2009 oct 29
  ubuntu 9.10 (karmic koala) is released
  source: wikipedia
2010
• 2010 apr 29
  ubuntu 10.04 (lucid lynx) is released
  source: wikipedia
• 2010 oct 10
  ubuntu 10.10 (maverick meerkat) is released
  source: wikipedia
2011
• 2011 apr 28
  ubuntu 11.04 (natty narwhal) is released
  source: wikipedia
• 2011 oct 13
  ubuntu 11.10 (oneiric ocelot) is released
  source: wikipedia
2012
• 2012 apr 26
  ubuntu 12.04 (precise pangolin) is released
  source: wikipedia
• 2012 oct 18
  ubuntu 12.10 (quantal quetzal) is released
  source: wikipedia
2013
• 2013 apr 25
  ubuntu 13.04 (raring ringtail) is released
  source: wikipedia
• 2013 oct 17
  ubuntu 13.10 (saucy salamander) is released
  source: wikipedia
2014
• 2014 apr 17
  ubuntu 14.04 (trusty tahr) is released
  source: wikipedia
• 2014 oct 23
  ubuntu 14.10 (utopic unicorn) is released
  source: wikipedia
2015
• 2015 apr 23
  ubuntu 15.04 (vivid vervet) is released
  source: wikipedia
• 2015 jul 29
  initial release of Windows 10
• 2015 oct 22
  ubuntu 15.10 (wily werewolf) is released
  source: wikipedia
2016
• 2016 apr 21
  ubuntu 16.04 (xenial xerus) is released
  source: wikipedia
• 2016 oct 13
  ubuntu 16.10 (yakkety yak) is released
  source: wikipedia
2017
• 2017 apr 13
  ubuntu 17.04 (zesty zapus) is released
  source: wikipedia
• 2017 oct 19
  ubuntu 17.10 (artful aardvark) is released
  source: wikipedia
2018
• 2018 apr 26
  ubuntu 18.04 (bionic beaver) is released
  source: wikipedia
• 2018 oct 18
  ubuntu 18.10 (cosmic cuttlefish) is released
  source: wikipedia
2019
• 2019 apr 18
  ubuntu 19.04 (disco dingo) is released
  source: wikipedia
• 2019 oct 17
  ubuntu 19.10 (eoan ermine) is released
  source: wikipedia
2020
• 2020 apr 23
  ubuntu 20.04 (focal fossa) is released
  source: wikipedia
• 2020 oct 22
  ubuntu 20.10 (groovy gorilla) is released
  source: wikipedia
2021
• 2021 apr 22
  ubuntu 21.04 (hirsute hippo) is released
  source: wikipedia
• 2021 oct 14
  ubuntu 21.10 (impish indri) is released
  source: wikipedia
2022
• 2022 apr 21
  ubuntu 22.04 (jammy jellyfish) is released
  source: wikipedia
• 2022 oct 20
  ubuntu 22.10 (kinetic kudu) is released
  source: wikipedia
2023
• 2023 apr 20
  ubuntu 23.04 (lunar lobster) is released
  source: wikipedia
• 2023 oct 12
  ubuntu 23.10 (mantic minotaur) is released
  source: wikipedia
2024
• 2024 apr 25
  ubuntu 24.04 (noble numbat) is released
  source: wikipedia
• 2024 oct 10
  ubuntu 24.10 (oracular oriole) is released
  source: wikipedia
2025
• 2025 apr 17
  ubuntu 25.04 (plucky puffin) is released
  source: wikipedia
• 2025 oct 9
  ubuntu 25.10 (questing quokka) is set to be released
  source: wikipedia