PostgreSQL development team releases a new major PostgreSQL Version once in a year which includes some new features, bugs and security fixes. PostgreSQL Global Development group supports a major version for 5 years after its initial release.
Pre-build binary packages for installation are available for different operating systems like BSD, macOS, Solaris, Windows, Linux which includes Ubuntu, SuSE, OpenSuSE, Red Hat family like CentOS, Fedora, Scientific and Oracle varients.
Check installed PostgreSQL version:
postgres=# SELECT version();
version
PostgreSQL 9.6.7 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18), 64-bit
(1 row)
Below are the release dates and supported PostgreSQL version. You can check the detailed information on the below PostgreSQL official site.
https://www.postgresql.org/support/versioning/
| Version | Current minor | Supported | First Release | Final Release |
| 12 | 12.1 | Yes | 3-Oct-19 | 14-Nov-24 |
| 11 | 11.6 | Yes | 18-Oct-18 | 9-Nov-23 |
| 10 | 10.11 | Yes | 5-Oct-17 | 10-Nov-22 |
| 9.6 | 9.6.16 | Yes | 29-Sep-16 | 11-Nov-21 |
| 9.5 | 9.5.20 | Yes | 7-Jan-16 | 11-Feb-21 |
| 9.4 | 9.4.25 | Yes | 18-Dec-14 | 13-Feb-20 |
| 9.3 | 9.3.25 | No | 9-Sep-13 | 8-Nov-18 |
| 9.2 | 9.2.24 | No | 10-Sep-12 | 9-Nov-17 |
| 9.1 | 9.1.24 | No | 12-Sep-11 | 27-Oct-16 |
| 9 | 9.0.23 | No | 20-Sep-10 | 8-Oct-15 |
| 8.4 | 8.4.22 | No | 1-Jul-09 | 24-Jul-14 |
| 8.3 | 8.3.23 | No | 4-Feb-08 | 7-Feb-13 |
| 8.2 | 8.2.23 | No | 5-Dec-06 | 5-Dec-11 |
| 8.1 | 8.1.23 | No | 8-Nov-05 | 8-Nov-10 |
| 8 | 8.0.26 | No | 19-Jan-05 | 1-Oct-10 |
| 7.4 | 7.4.30 | No | 17-Nov-03 | 1-Oct-10 |
| 7.3 | 7.3.21 | No | 27-Nov-02 | 27-Nov-07 |
| 7.2 | 7.2.8 | No | 4-Feb-02 | 4-Feb-07 |
| 7.1 | 7.1.3 | No | 13-Apr-01 | 13-Apr-06 |
| 7 | 7.0.3 | No | 8-May-00 | 8-May-05 |
| 6.5 | 6.5.3 | No | 9-Jun-99 | 9-Jun-04 |
| 6.4 | 6.4.2 | No | 30-Oct-98 | 30-Oct-03 |
| 6.3 | 6.3.2 | No | 1-Mar-98 | 1-Mar-03 |