The Debian project has announced that the security support period for the 6.0 ("squeeze") release has been extended by nearly two years; it now runs out in February 2016. At the end, squeeze will have received a full five years of security support. "squeeze-lts is only going to support i386 and amd64. If you're running a different architecture you need to upgrade to Debian 7 (wheezy). Also there are going to be a few packages which will not be supported in squeeze-lts (e.g. a few web-based applications which cannot be supported for five years). There will be a tool to detect such unsupported packages."
April 18, 2014
Debian 6.0 to Get Long-Term Support
Read more at LWN