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    <div class="moz-cite-prefix">use UTC? :)<br>
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      On 05/13/2014 10:11 PM, Zoidsoft wrote:<br>
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cite="mid:CAB+ttKwh4dMAvR6W0nsSJnzivNNrv7noNp68f1bkoM61CoP6sg@mail.gmail.com"
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      <div dir="ltr">I wonder how they keep aircraft from landing on top
        of each other on the runway when the skip forward or back?</div>
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        <div class="gmail_quote">On Tue, May 13, 2014 at 4:08 PM, Paul
          Eggert <span dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:eggert@cs.ucla.edu" target="_blank">eggert@cs.ucla.edu</a>&gt;</span>
          wrote:<br>
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            <div>On 05/13/2014 10:49 AM, Steve Allen wrote:<br>
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0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
                the line "Planes will crash" becomes pitted against the
                lack of evidence that has ever happened.<br>
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            I would guess that air safety issues concerning daylight
            saving time are more about the transitions than about when
            the transition rules change. Although it was long assumed
            that people readily compensate for DST transitions, more
            recent research suggests that sleep loss persists for
            several days, and that this can increase automobile accident
            rates. As far as I know, DST's effect on air safety has
            never been studied; one might presume it's smaller than in
            automobile safety since pilots need to adjust to time zone
            changes anyway, but DST also affects ground crews who don't
            move that much.<br>
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            For a recent review of sleep-related concerns, please see:<br>
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            Harrison Y. The impact of daylight saving time on sleep and
            related behaviours. Sleep Med Rev. 2013 Aug;17(4):285–92. <a
              moz-do-not-send="true"
              href="http://dx.doi.org/10.1016/j.smrv.2012.10.001"
              target="_blank">http://dx.doi.org/10.1016/j.smrv.2012.10.001</a><br>
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