From Fedora Project Wiki

Fedora Project maintains each release of Fedora according to the Fedora Release Life Cycle. The following releases have reached End of Life, and are no longer maintained and do not receive any updates. To get the latest release, visit http://get.fedoraproject.org. If you want to upgrade your old system, please check Upgrading page for details.

Unsupported Fedora Releases

Release EOL since Maintained for
Fedora 19 2015-01-06 553 days
Fedora 18 2014-01-14 364 days
Fedora 17 2013-07-30 427 days
Fedora 16 2013-02-12 462 days
Fedora 15 2012-06-26 399 days
Fedora 14 2011-12-09 402 days
Fedora 13 2011-06-24 395 days
Fedora 12 2010-12-02 380 days
Fedora 11 2010-06-25 381 days
Fedora 10 2009-12-17 387 days
Fedora 9 2009-07-10 423 days
Fedora 8 2009-01-07 426 days
Fedora 7 2008-06-13 379 days
Fedora Core 6 2007-12-07 409 days
Fedora Core 5 2007-07-02 469 days
Fedora Core 4 2006-08-07 420 days
Fedora Core 3 2006-01-16 434 days
Fedora Core 2 2005-04-11 328 days
Fedora Core 1 2004-09-20 320 days

More information

For more information on how End of Life is managed, visit the End of life SOP.