Red Hat Enterprise Linux Release Dates

To find your Red Hat Enterprise Linux release please:

cat /etc/redhat-release  

To find your kernel version please:

uname -a  

Red Hat Enterprise Linux 2.1  -  Codename: Pensacola (AS) / Panama (ES) (based on Red Hat Linux 7.2)

Release/Update          General Availability Date        Kernel Version  
 RHEL 2.1 GA               2002-03-23                    2.4.9-e.3  
 RHEL 2.1 Update 1         2003-02-14                    2.4.9-e.12  
 RHEL 2.1 Update 2         2003-03-29                    2.4.9-e.24  
 RHEL 2.1 Update 3         2004-12-19                    2.4.9-e.34  
 RHEL 2.1 Update 4         2004-04-21                    2.4.9-e.40  
 RHEL 2.1 Update 5         2004-08-18                    2.4.9-e.49  
 RHEL 2.1 Update 6         2004-12-13                    2.4.9-e.57  
 RHEL 2.1 Update 7         2005-04-28                    -  

Red Hat Enterprise Linux 3  -  Codename: Taroon (based on Red Hat Linux 9)

Release/Update          General Availability Date        Kernel Version  
 RHEL 3 GA                 2003-10-22                     2.4.21-4  
 RHEL 3 Update 1           2004-01-16                     2.4.21-9  
 RHEL 3 Update 2           2004-05-12                     2.4.21-15  
 RHEL 3 Update 3           2004-09-03                     2.4.21-20  
 RHEL 3 Update 4           2004-12-12                     2.4.21-27  
 RHEL 3 Update 5           2005-05-18                     2.4.21-32  
 RHEL 3 Update 6           2005-09-28                     2.4.21-37  
 RHEL 3 Update 7           2006-03-17                     2.4.21-40  
 RHEL 3 Update 8           2006-07-20                     2.4.21-47  
 RHEL 3 Update 9           2007-06-20                     2.4.21-50  

Red Hat Enterprise Linux 4  -  Codename: Nahant (based on Fedora Core 3)

Release/Update    General Availability Date   redhat-release Errata Date*    Kernel Version  
 RHEL 4 GA          2005-02-15                   -                             2.6.9-5  
 RHEL 4 Update 1    2005-06-08               2005-06-08 RHEA-2005:318          2.6.9-11  
 RHEL 4 Update 2    2005-10-05               2005-10-05 RHEA-2005:786          2.6.9-22  
 RHEL 4 Update 3    2006-03-12               2006-03-07 RHBA-2006:0149         2.6.9-34  
 RHEL 4 Update 4    2006-08-10               2006-08-10 RHBA-2006:0601         2.6.9-42  
 RHEL 4 Update 5    2007-05-01               2007-04-27 RHBA-2007:0196         2.6.9-55  
 RHEL 4 Update 6    2007-11-15               2007-11-15 RHBA-2007:0897         2.6.9-67  
 RHEL 4 Update 7    2008-07-29               2008-07-24 RHEA-2008:0769         2.6.9-78  
 RHEL 4 Update 8    2009-05-19               2009-05-18 RHEA-2009:1002         2.6.9-89  
 RHEL 4 Update 9    2011-02-16               2011-02-16 RHEA-2011:0251         2.6.9-100  

Red Hat Enterprise Linux 5  -  Codename: Tikanga (based on Fedora Core 6)

 Release/Update    General Availability Date   redhat-release Errata Date*   Kernel Version  
 RHEL 5 GA          2007-03-15               -                               2.6.18-8  
 RHEL 5 Update 1    2007-11-07               2007-11-07 RHEA-2007:0854       2.6.18-53  
 RHEL 5 Update 2    2008-05-21               2008-05-20 RHEA-2008:0436       2.6.18-92  
 RHEL 5 Update 3    2009-01-20               2009-01-20 RHEA-2009:0133       2.6.18-128  
 RHEL 5 Update 4    2009-09-02               2009-09-02 RHEA-2009:1400       2.6.18-164  
 RHEL 5 Update 5    2010-03-30               2010-03-30 RHEA-2010:0207       2.6.18-194  
 RHEL 5 Update 6    2011-01-13               2011-01-12 RHEA-2011:0020       2.6.18-238  
 RHEL 5 Update 7    2011-07-21               2011-07-20 RHEA-2011:0977       2.6.18-274  
 RHEL 5 Update 8    2012-02-20               2012-02-20 RHEA-2012:0315       2.6.18-308  
 RHEL 5 Update 9    2013-01-07               2013-01-07 RHEA-2013-0021       2.6.18-348  
 RHEL 5 Update 11   2014-09-16               2014-09-16 RHEA-2014-1238       2.6.18-398  
 RHEL 5 Update 10   2013-10-01               2013-09-30 RHEA-2013-1311       2.6.18-371  

Red Hat Enterprise Linux 6  -  Codename: Santiago (based on a mix of Fedora 12, Fedora 13, and several modifications)

 Release/Update      General Availability Date      redhat-release Errata Date*      Kernel Version  
 RHEL 6 GA            2010-11-09                      -                              2.6.32-71  
 RHEL 6 Update 1      2011-05-19                  2011-05-19 RHEA-2011:0540          2.6.32-131.0.15  
 RHEL 6 Update 2      2011-12-06                  2011-12-06 RHEA-2011:1743          2.6.32-220  
 RHEL 6 Update 3      2012-06-20                  2012-06-19 RHSA-2012-0862          2.6.32-279  
 RHEL 6 Update 4      2013-02-21                  2013-02-21 RHSA-2013-0496          2.6.32-358  
 RHEL 6 Update 5      2013-11-21                  2013-11-20 RHSA-2013:1645-2        2.6.32-431  
 RHEL 6 Update 6      2014-10-14                  2014-10-13 RHEA-2014:1608          2.6.32-504  
 RHEL 6 Update 7      2015-07-22                  2015-07-22 RHEA-2015:1423          2.6.32-573  
 RHEL 6 Update 8      TBA                         TBA                                TBA  

Red Hat Enterprise Linux 7  -  Codename: Maipo (based on a mix of Fedora 19, Fedora 20, and several modifications)

 Release/Update   General Availability Date   redhat-release Errata Date*   Kernel Version  
 RHEL 7 Beta       2013-12-11                 -                             3.10.0-54.0.1  
 RHEL 7 RC         2014-04-23                 -                             3.10.0-121  
 RHEL 7 GA         2014-06-09                 -                             3.10.0-123  
 RHEL 7 Update 1   2015-03-05                 2015-03-05 RHEA-2015:0524     3.10.0-229  
 RHEL 7 Update 2   TBA                        TBA                           TBA