[plt-scheme] Suggestion for (lib "date.ss"): add timezone to 'american

From: Andrew Reilly (andrew-scheme at areilly.bpc-users.org)
Date: Wed Nov 21 23:21:39 EST 2007

On Wed, Nov 21, 2007 at 01:54:52PM -0500, Geoff Knauth wrote:
> I start at the US Naval Observatory for information regarding clocks  
> and time.
> This has all the single-letter world time zone abbreviations (e.g.,  
> Z=Zulu=GMT=UTC):
>   http://aa.usno.navy.mil/faq/docs/world_tzones.php
> I've seen -0700 written as UTC-0700 and GMT-0700.
> This list of commonly used abbreviations looks decent:
>   http://www.timeanddate.com/library/abbreviations/timezones/
> but there are more...
>   http://wwp.greenwichmeantime.com/time-zone/time-zones.htm
>   http://www.timegenie.com/timezones.php
>   http://www.worldtimezone.com/wtz-names/timezonenames.html
> On my computer, there's some interesting time zone info in my  
> PostgreSQL installation:
>   /opt/local/share/postgresql82/timezonesets  (readable ASCII)
> But the pi?ce de r?sistance, gobs of time zone info for hackers:
>   http://www.twinsun.com/tz/tz-link.htm
> Happy Thanksgiving everyone!

I notice that you're posting from a Mac.  Therefore you can find
more time zone information than you ever wanted by pointing the
zdump command at the files under /usr/share/zoneinfo.  Same
applies to any BSD box, and I suspect most Linux ones too.
Additionally, if you have a source tree installed, then you can
check out the source files in /usr/src/share/zoneinfo/...  These
contain comments that can be interesting in themselves: lots of
historical information in some cases.



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