CentOS Errata and Enhancement Advisory 2015:0141 

Upstream details at : https://rhn.redhat.com/errata/RHEA-2015-0141.html

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

i386:
0eed49ffbfe3a3af9e29e74072531a567cb05578f3050380f04df7e28c093ff7  tzdata-2015a-1.el6.noarch.rpm
4a23515cf9b03dcde28bbf82f516cbd9609433d41d53da53778f3e3cf792c407  tzdata-java-2015a-1.el6.noarch.rpm

x86_64:
0eed49ffbfe3a3af9e29e74072531a567cb05578f3050380f04df7e28c093ff7  tzdata-2015a-1.el6.noarch.rpm
4a23515cf9b03dcde28bbf82f516cbd9609433d41d53da53778f3e3cf792c407  tzdata-java-2015a-1.el6.noarch.rpm

Source:
dc7dc3c9fb0dc563879803d4d6bf14bb84910d12a21905e878a816849fe32ebd  tzdata-2015a-1.el6.src.rpm