Proposal for new ISO C 9x time API

Markus Kuhn Markus.Kuhn at
Sun Sep 20 22:49:24 UTC 1998

Chris Newman wrote on 1998-09-16 18:51 UTC:
> I think it would be useful to have a function which returns the time and
> duration of the next transition given time X and timezone Y (e.g., 2 AM
> Mar 30 -1 hour).

OK, that sounds like a good idea. I have just added a function tz_jump()
to my proposal that I hope does what you want. It allows you to iterate
through both leap seconds and timezone changes, perhaps even calendar
exceptions. Please have a look at section 1.3.4 in


Markus G. Kuhn, Security Group, Computer Lab, Cambridge University, UK
email: mkuhn at,  home page: <>

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