Pandas add one day to column

Question

I need to add 1 day to each date I want to get the begining date of the following month eg 2014-01-2014 for the 1st item in the dataframe. Tried:

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Answer 1

As far as I can tell tshift is a bit faster than doing math such as + pd.DateOffset etc. Of course it only applies to Series or Dataframe indices, not columns.. but you could do:

df['newdate'] = pd.Series(index=df.index).tshift(periods=1, freq='D').index

If your df is large, this may shave off half the time - at least it did for me, which is why I'm using it.