Calls out 2:30 AM UTC-5 = 3:30 AM UTC-4.

spec.html

@@ -25944,7 +25944,7 @@ <h1>LocalTimeZoneAdjustment ( _t_, _isUTC_ )</h1>
         <emu-note>
           <p>It is recommended that implementations use the time zone information of the IANA Time Zone Database <a href="http://www.iana.org/time-zones/">http://www.iana.org/time-zones/</a>.</p>
           <p>1:30 AM on November 5, 2017 in America/New_York is repeated twice (fall backward), but it must be interpreted as 1:30 AM UTC-04 instead of 1:30 AM UTC-05. LocalTZA(TimeClip(MakeDate(MakeDay(2017, 10, 5), MakeTime(1, 30, 0, 0))), false) is <emu-eqn>-4 &times; msPerHour</emu-eqn>.</p>
-          <p>2:30 AM on March 12, 2017 in America/New_York does not exist, but it must be interpreted as 2:30 AM UTC-05. LocalTZA(TimeClip(MakeDate(MakeDay(2017, 2, 12), MakeTime(2, 30, 0, 0))), false) is <emu-eqn>-5 &times; msPerHour</emu-eqn>.</p>.
+          <p>2:30 AM on March 12, 2017 in America/New_York does not exist, but it must be interpreted as 2:30 AM UTC-05 (equivalent to 3:30 AM UTC-04). LocalTZA(TimeClip(MakeDate(MakeDay(2017, 2, 12), MakeTime(2, 30, 0, 0))), false) is <emu-eqn>-5 &times; msPerHour</emu-eqn>.</p>.
         </emu-note>
       </emu-clause>