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pandas.Series.dt.tz
Series.dt.tz
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Return timezone, if any.
Returns: - datetime.tzinfo, pytz.tzinfo.BaseTZInfo, dateutil.tz.tz.tzfile, or None
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Returns None when the array is tz-naive.
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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.25.0/reference/api/pandas.Series.dt.tz.html