The IESG has approved the following document: - 'CalDAV: Time Zones by Reference' (draft-ietf-tzdist-caldav-timezone-ref-05.txt) as Proposed Standard This document is the product of the Time Zone Data Distribution Service Working Group. The IESG contact persons are Ben Campbell, Barry Leiba and Alissa Cooper. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-tzdist-caldav-timezone-ref/ Technical Summary This document specifies changes to the CalDAV protocol that enables clients and servers to not have to exchange VTIMEZONE infromation, but instead make use of tzdist servers. Review and Consensus An issue tracker was maintained and all open issues have been resolved. This draft enjoys support from the WG, although there are fewer interested parties when it comes to caldav. A review of the Prefer: header request is in progress. Personnel The document shepherd is Eliot Lear. The responsible Area Director is Barry Leiba.