to_json converts to UTC when encoding ISO formatted datetimes #12997
Description
Code Sample
In [99]: ts = Timestamp('2013-01-10 00:00:00-0500', tz='US/Eastern') In [100]: pd.io.json.dumps(ts, iso_dates=True) Out[100]: '"2013-01-10T05:00:00.000Z"' Expected Output
In [100]: pd.io.json.dumps(ts, iso_dates=True) Out[100]: '"2013-01-10T00:00:00.000-05:00"' cf
In [109]: ts.isoformat() Out[109]: '2013-01-10T00:00:00-05:00'