Sage Release Tours
See also: Changelogs, sage-announce
Versions 9.x (2020)
Sage 9.2 (in planning) – first release for Python 3 only; major package upgrades planned
Sage 9.1 (in progress, May 2020) – last release supporting both Python 2 and 3; major portability improvements
Sage 9.0 (released Jan 1, 2020) – first release that uses Python 3 by default
Versions 5.x–8.x (2012–2019)
No release tours were written for these releases, however, changelogs and release announcements on sage-announce are available
Versions 4.x (2009–2012)
Versions 3.x (2008–2009)