pd.concat reset the tz-aware index to UTC · Issue #18422 · pandas-dev/pandas (original) (raw)

Hi,

Having two DataFrames with index being tz-aware Timestamp objects

print(concat_df[0].index.tz, concat_df[1].index.tz)
fxt = pd.concat(concat_df, axis=1)
print(fxt.index.tz)

This leads to the following output

Australia/Melbourne Australia/Melbourne
UTC

I believe this may be in some way related to #7562

pandas version = 0.21.0