DataFrame.tz_localize()

tz : string or pytz.timezone object

axis : the axis to localize

level : int, str, default None

If axis ia a MultiIndex, localize a specific level. Otherwise must be None

copy : boolean, default True

Also make a copy of the underlying data

ambiguous : ?infer?, bool-ndarray, ?NaT?, default ?raise?

• ?infer? will attempt to infer fall dst-transition hours based on order
• bool-ndarray where True signifies a DST time, False designates a non-DST time (note that this flag is only applicable for ambiguous times)
• ?NaT? will return NaT where there are ambiguous times
• ?raise? will raise an AmbiguousTimeError if there are ambiguous times

infer_dst : boolean, default False (DEPRECATED)

Attempt to infer fall dst-transition hours based on order