A tzdata bugfix update has been released for CentOS 7.

CentOS-announce: CEBA-2020:1982 CentOS 7 tzdata BugFix Update

CentOS Errata and Bugfix Advisory 2020:1982

Upstream details at :   https://access.redhat.com/errata/RHBA-2020:1982

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

x86_64:
bc5c790c0a346bb20abbbd866e0c1cf664cec9c3e4d4e21dbfe32b32616257ba tzdata-2020a-1.el7.noarch.rpm
df284a4379294602228b360243cb0fc0498371278b702354b9de2cc38ffbc09f tzdata-java-2020a-1.el7.noarch.rpm

Source:
d348bae19f293c56bb60b0f65b3d3dcf4523128a36ee356f0c7231da1219d2f4 tzdata-2020a-1.el7.src.rpm