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At 10:03 3/23/2011, Steve Jones wrote:<br>
<blockquote type=cite class=cite cite="">The current Mountain/Central
boundary in the most recent official US DOT description (49CFR71.7,
<a href="http://goo.gl/tqBou" eudora="autourl">http://goo.gl/tqBou</a>),
has the border running right through Fort Pierre South
Dakota.</blockquote><br>
A follow up:<br><br>
In the above I made a major error by failing to recognize the
significance of this part of 49CFR71.7:<br><br>
<blockquote type=cite class=cite cite="">(g) <i>Points on boundary line.
</i>All municipalities located upon the zone boundary line described in
this section are in the mountain standard time zone, except Murdo, S.
Dak., which is in the central standard time zone.</blockquote><br>
So all of the municipality of Fort Pierre is indeed within the Mountain
Time zone.<br><br>
Today I released OnTimeZone.com v1.05, which includes my interpretation
of the Fort Pierre anomaly, as well as a similar situation in Winterhaven
California, which, in respect to proximity to Yuma AZ, observes what it
calls "Arizona Time" (Mountain Standard Time) year
round.<br><br>
Here is what the site says about these changes:<br><br>
<blockquote type=cite class=cite cite="">SD: The city of Fort Pierre
(legally in the Mountain time zone) and a large radius on the west side
of the Mountain/Central border observes Central time. Research determined
that the distance this observance extends to the west is a matter of
disagreement among the locals. After some effort to get a definitive
answer I gave up and arbitrarily selected 20 miles, though I heard
credible opinions that it stretched out as much as 50 miles. There are no
services and very few residents in the western part of Stanley county, so
the point is somewhat moot.<br><br>
CA: Winterhaven California, in deference to its proximity to Yuma AZ,
observes Mountain Standard Time year round. This means that (like AZ)
Winterhaven does not observe Daylight Saving time. So this puts
Winterhaven ahead of California by one hour (in sync with Arizona) during
Standard time - in the Fall and Winter. And in sync with both CA and AZ
during Spring and Summer (Daylight Saving time). The dividing line of
this observed boundary is locally considered to be the "All American
Canal". </blockquote><br>
I hope this information is of use to some here.<br><br>
Regards,<br><br>
Steve Jones<br>
OnTimeZone.com</body>
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