From 13bc79695262eed11190245bdd438ba4cec6148e Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri, 6 Dec 2024 20:31:05 -0800
Subject: [PATCH] Update USDOT map description

* tz-link.html: Improve description of DOT map data, inspired by a
suggestion from Arthur David Olson in:
https://lists.iana.org/hyperkitty/list/tz@iana.org/message/UKSUARQTHCUPKK2GGAD3KQ6I3EBHC3WB/
---
 tz-link.html | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/tz-link.html b/tz-link.html
index c9b1ec7c..f4f76fdd 100644
--- a/tz-link.html
+++ b/tz-link.html
@@ -935,9 +935,13 @@ with perhaps the best-documented history of clock adjustments.</dd>
 <dt>United States</dt>
 <dd>The Department of Transportation's <a
 href="https://www.transportation.gov/regulations/recent-time-zone-proceedings">Recent
-Time Zone Proceedings</a> lists changes to time zone boundaries, and its <a
+Time Zone Proceedings</a> lists changes to
+official written time zone boundaries, and its <a
 href="https://geodata.bts.gov/datasets/usdot::time-zones/about">Time
-Zones dataset</a> lists current boundaries.</dd>
+Zones dataset</a> maps current boundaries.
+These boundaries are only for standard time, so the current map puts
+all of Arizona in one time zone even though part of Arizona
+observes <abbr>DST</abbr> and part does not.</dd>
 <dt>Uruguay</dt>
 <dd>The Oceanography, Hydrography, and Meteorology Service of the Uruguayan
 Navy (SOHMA) publishes an annual <a
@@ -996,7 +1000,8 @@ should we abolish Daylight Saving Time?</a>
 <em>J Biol Rhythms.</em> 2019;34(3):227&ndash;230.
 doi:<a href="https://doi.org/10.1177/0748730419854197">10.1177/0748730419854197</a>.
 The Society for Research on Biological Rhythms
-opposes DST changes and permanent DST, and advocates that governments adopt
+opposes <abbr>DST</abbr> changes and permanent <abbr>DST</abbr>,
+and advocates that governments adopt
 "permanent Standard Time for the health and safety of their citizens".</li>
 </ul>
 </section>
-- 
2.47.0

