7 year of production support is coming to an end on 29th Feb 2012. RHEL4 was released in 2005 and its support end this month end with no future Errata’s and Bug Fixes any more. But there is a good news thought as published by Red Hat here that they have made the Life Cycle 10 years for RHEL 5 and 6 before it comes to EOL, so an extension of 3 years.
Read here what this all means and what will be the consequences for RHEL4: