RFC 9636 · PROPOSED STANDARD · 2024
SUN · 14 JUN 2026
The Time Zone Information Format
Overview
RFC 9636, “The Time Zone Information Format”, is a Proposed Standard document published in October 2024 by A. Olson, P. Eggert, K. Murchison. It obsoletes RFC 8536. The canonical text is published by the RFC Editor.
Abstract
This document specifies the Time Zone Information Format (TZif) for representing and exchanging time zone information, independent of any particular service or protocol. Two media types for this format are also defined.
This document replaces and obsoletes RFC 8536.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 9636 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
Relationships to other RFCs
Other RFCs from 2024
- RFC 9635 Grant Negotiation and Authorization Protocol
- RFC 9637 Expanding the IPv6 Documentation Space
- RFC 9634 Operations, Administration, and Maintenance for Deterministic Networking with the IP Data Plane
- RFC 9638 Network Virtualization over Layer 3 Encapsulation Considerations
- RFC 9633 Deterministic Networking YANG Data Model
- RFC 9639 Free Lossless Audio Codec
- RFC 9632 Finding and Using Geofeed Data
- RFC 9640 YANG Data Types and Groupings for Cryptography