I mean that somehow I could express getting data in an exact given period of time, say, exactly the day September 11, 2015 in the time zone CET (that day started at 3pm relative to PDT or 11pm relative to UTC). Without time zone support, I would get data “outside” of my desired local time zone. Hope this makes sense and is clear. 

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Dr. Thomas Steiner, Employee, Google Inc.
http://blog.tomayac.com, http://twitter.com/tomayac

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