python - How can I convert a series of integers into dates? -

i have pandas series of integers such as

151215 

i want convert these integers in dates

2015-12-15 

that means 15th december 2015. quick search on pandas websites suggests me use to_datetime() method. unfortunately realised if the pandas data string

st = '151215' pd.to_datetime(st) 

then works correctly (except fact don't need time)

timestamp('2015-12-15 00:00:00') 

but when pandas data integers

st = 151215 pd.to_datetime(st) 

the result is

timestamp('1970-01-01 00:00:00.000151215') 

could suggest me efficient way convert list of integers dates

you can use pandas.to_datetime no need convert string first (at least in pandas 0.19):

dates = pd.series([151215]*8) dates = pd.to_datetime(dates, format="%y%m%d") print(dates) 0   2015-12-15 1   2015-12-15 2   2015-12-15 3   2015-12-15 4   2015-12-15 5   2015-12-15 6   2015-12-15 7   2015-12-15 dtype: datetime64[ns] 

converting single value in example result in timestamp('2015-12-15 00:00:00'), if pass entire series result looks above.