I've updated the graph at:
http://www.megapathdsl.net/~hmurray/time-nuts/line/Calif-60Hz-2014-2015.pn
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and added July-2015 at:
http://www.megapathdsl.net/~hmurray/time-nuts/line/Calif-60Hz-2015-Jul.png
July 19th shifted 15 seconds in one day!
The shift is 25 seconds over July 17-19.
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