[tz] tzfile(5)

Paul Eggert eggert at cs.ucla.edu
Mon Nov 13 08:21:15 UTC 2017

Ken Murchison wrote:
> Is https://github.com/eggert/tz/blob/master/tzfile.5 the normative reference for 
> the binary format of tzdata?

That's the development version, yes. The latest released version is here:


(Unfortunately it's not available via https: directly, though we'd like to fix 

> I thinking about writing an I-D to register application/tzfile as a MIME type 
> for use with TZDist <https://tools.ietf.org/html/rfc7808> and I obviously need a 
> reference to the file format.  Or should I document the format in the draft?  
> Does anyone want to suggest a different name for the format?

Presumably somebody (you? perhaps with my help?) would need to document the 
format in IETF-ese. application/tzfile sounds good to me.

More information about the tz mailing list