Updated TzData packages has been released for CentOS 6 and 7:

CEEA-2017:3052 CentOS 6 tzdata Enhancement Update
CEEA-2017:3052 CentOS 7 tzdata Enhancement Update

CEEA-2017:3052 CentOS 6 tzdata Enhancement Update

CentOS Errata and Enhancement Advisory 2017:3052

Upstream details at : https://access.redhat.com/errata/RHEA-2017:3052

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

i386:
7a35a774683c1ddda053e063c7d74ad70f7da0d98b958930699f09f175e31f21 tzdata-2017c-1.el6.noarch.rpm
a5ee76588834b62c84bbd990ed5af2d69e342c161c6a08a1be0352c987068c90 tzdata-java-2017c-1.el6.noarch.rpm

x86_64:
7a35a774683c1ddda053e063c7d74ad70f7da0d98b958930699f09f175e31f21 tzdata-2017c-1.el6.noarch.rpm
a5ee76588834b62c84bbd990ed5af2d69e342c161c6a08a1be0352c987068c90 tzdata-java-2017c-1.el6.noarch.rpm

Source:
f3d624d4b5340378fb0eee2f99d9269c6847ff4487c4997afcb6e28c6a7b82be tzdata-2017c-1.el6.src.rpm

CEEA-2017:3052 CentOS 7 tzdata Enhancement Update

CentOS Errata and Enhancement Advisory 2017:3052

Upstream details at : https://access.redhat.com/errata/RHEA-2017:3052

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

x86_64:
c9f0d7fde7ab3952e0ba0343757b60f1477cf62074063cd9f35afeffc3d18032 tzdata-2017c-1.el7.noarch.rpm
f3dd206595a2476b7e11197263ef695d8844aaae58cbb4b39dc2a89a35ce8d7a tzdata-java-2017c-1.el7.noarch.rpm

Source:
501c2b5e270663d3803ef40654ae931e254e9fac61ef6a27a7d55faffe75cbfc tzdata-2017c-1.el7.src.rpm