2019-05-06 Timezone Registry and Service Recommendations V1.0 (CD 0606) CC 0606:2006 pubdocs/CD0606%20Timezone%20Registry%20and%20Service%20Recommendations%20V1.0.pdf 2006-04-17 This document contains technical recommendations on implementing a time zone registry and a time zone service. Standardized time zones are needed for improved interoperability to avoid some common problems, and to allow using time zones by reference rather than value. published TIMEZONE