API: preserver tz on created series from Index when possible #7822
Description
I think this could be done w/o breaking anything else.
xref: #3950
In [16]: ts = pd.date_range('1/1/2011', periods=5, freq='10s', tz = 'US/Eastern') In [17]: ts Out[17]: <class 'pandas.tseries.index.DatetimeIndex'> [2011-01-01 00:00:00-05:00, ..., 2011-01-01 00:00:40-05:00] Length: 5, Freq: 10S, Timezone: US/Eastern In [18]: pd.DataFrame( {'a' : ts } )