CentOS Errata and Enhancement Advisory 2015:0855 

Upstream details at : https://rhn.redhat.com/errata/RHEA-2015-0855.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( sha256sum Filename ) 

i386:
bb11ad2b0d763dc63ba347692f80597749c2e5d609c0a220773281cc646165d2  tzdata-2015c-2.el6.noarch.rpm
1cd31efa0e7c701059f2788a919edebffad88712cf14daa04b53ce5b181d77cf  tzdata-java-2015c-2.el6.noarch.rpm

x86_64:
bb11ad2b0d763dc63ba347692f80597749c2e5d609c0a220773281cc646165d2  tzdata-2015c-2.el6.noarch.rpm
1cd31efa0e7c701059f2788a919edebffad88712cf14daa04b53ce5b181d77cf  tzdata-java-2015c-2.el6.noarch.rpm

Source:
a8a236e0677ee108c9d3179b4358a3694c587e7904b44853a4ee9ef047b712a1  tzdata-2015c-2.el6.src.rpm