This is not quite to your exact specification, but should help you to write 
what you want:

user> (defn to-utc [dt]
        (t/to-time-zone dt (t/time-zone-for-offset 0)))
#'user/to-utc
user> (to-utc (t/from-time-zone (t/date-time 1967 7 31 6 30) 
(t/time-zone-for-id "America/Caracas")))
#<DateTime 1967-07-31T10:30:00.000Z>

--Steve

On Jun 14, 2014, at 10:09 AM, gvim <gvi...@gmail.com> wrote:

> I want to convert a time specified with a TZ datababse timezone such as 
> "America/Caracas" into a UTC date-time but I can only find in clj-time 
> from-time-zone and to-time-zone allowing the zone to be specified as a 
> string. I want:
> 
> (t/<some-utc-func> (t/date-time 1967 7 31 6 30) (t/time-zone-for-id 
> "America/Caracas"))
> 
> to give me:
> 
> #<DateTime 1967-07-31T10:30:00.000-00:00>
> 
> Even the (t/from-time-zone []) output would do if I could read the UTC date 
> and time straight from it.
> 
> gvim
> 
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