I'm a little confused by the behavior of a date_histogram. My
understanding from the documentation
(http://www.elasticsearch.org/guide/reference/api/search/facets/date-histogram-facet.html)
is that a when providing a "time_zone" in the facet ElasticSearch will
adjust the "time" returned for each bucket to be milliseconds from epoch in
the specified "time_zone" (defaulting to UTC). But when I test this out as
shown in this gist: https://gist.github.com/1510658 it doesn't seem to be
adjusting the returned "time"s at all.
Do I need to set up a mapping of some kind on the index to tell it that the
times are in UTC, or something?
Also is there a way to change the format of the returned "time"s to be an
ISO format date string?
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