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+testdata/zoneinfo contains time-zone data files that may be used with CCTZ.
+Install them in a location referenced by the ${TZDIR} environment variable.
+Symbolic and hard links have been eliminated for portability.
+
+On Linux systems the distribution's versions of these files can probably
+already be found in the default ${TZDIR} location, /usr/share/zoneinfo.
+
+New versions can be generated using the following shell script.
+
+ #!/bin/sh -
+ set -e
+ DESTDIR=$(mktemp -d)
+ trap "rm -fr ${DESTDIR}" 0 2 15
+ (
+ cd ${DESTDIR}
+ git clone https://github.com/eggert/tz.git
+ make --directory=tz \
+ install DESTDIR=${DESTDIR} \
+ DATAFORM=vanguard \
+ TZDIR=/zoneinfo \
+ REDO=posix_only \
+ LOCALTIME=Factory \
+ TZDATA_TEXT= \
+ ZONETABLES=zone1970.tab
+ tar --create --dereference --hard-dereference --file tzfile.tar \
+ --directory=tz tzfile.h
+ tar --create --dereference --hard-dereference --file zoneinfo.tar \
+ --exclude=zoneinfo/posixrules zoneinfo \
+ --directory=tz version
+ )
+ tar --extract --directory src --file ${DESTDIR}/tzfile.tar
+ tar --extract --directory testdata --file ${DESTDIR}/zoneinfo.tar
+ exit 0
+
+To run the CCTZ tests using the testdata/zoneinfo files, execute:
+
+ bazel test --test_env=TZDIR=${PWD}/testdata/zoneinfo ...