The IESG has approved the following document: - 'The Time Zone Information Format (TZif)' (draft-murchison-tzdist-tzif-16.txt) as Proposed Standard This document has been reviewed in the IETF but is not the product of an IETF Working Group. The IESG contact person is Alexey Melnikov. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-murchison-tzdist-tzif/ Technical Summary This document defines the Time Zone Information Format (TZif) for representing and exchanging time zone information, independent of any particular service or protocol. Two MIME media types for this format are also defined. Note that this format has existed for over three decades in one form or another. Working Group Summary This document was not considered by any existing working group. The AD considered creating a WG, but it was thought that things were moving quickly enough with the right people without one. Document Quality This format is widely deployed. Ned Freed did a media-type review on June 6, 2018. However, a second review was requested, as the media-type entries have changed. Personnel Eliot Lear is the Shepherd. Alexey Melnikov is the responsible AD.