Because you're converting your UTC time to UTC.

On Fri, Apr 21, 2017 at 4:03 PM, Rob Richardson <rdrichard...@rad-con.com>
wrote:

> Hello!
>
> I'm in the Eastern US time zone, in daylight savings time.  I am four
> hours earlier than UTC time.  I have a column that stores UTC times as
> Julian times (floating-point numbers).  The latest data point in the table
> was stored at about 8:41 this morning (4/21).
>
> I am getting strange results from this query:
> select max(value_timestamp),
> datetime(max(julianday(value_timestamp)), 'localtime'),
> datetime(max(julianday(value_timestamp)), 'utc') from trend_data
>
> The results are:
> 2457864.86179398
> 2017-04-21 04:40:59
> 2017-04-21 12:40:59
>
> How is it that switching from local time to UTC gives an eight-hour
> difference?
>
> Thank you very much.
>
> RobR
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