https://datatracker.ietf.org/doc/draft-murchison-tzdist-tzif/00/
draft-murchison-tzdist-tzif-00 - The Time Zone Information Format (TZif)
This document defines the Time Zone Information File Format for representing and exchanging time zone information, independent of any particular service or...
time zone informationdraftmurchison
https://mm.icann.org/pipermail/tz/1988-January/034155.html
Help wanted in updating time zone information files
time zone informationhelp wantedupdatingfiles