The zoneinfo.zip archive contains time zone files compiled using
the code and data maintained as part of the IANA Time Zone Database.
The IANA asserts that the database is in the public domain.

For more information, see
http://www.iana.org/time-zones
ftp://ftp.iana.org/tz/code/tz-link.htm
http://tools.ietf.org/html/rfc6557

To rebuild the archive, read and run update.bash.