Hi Tim you need to first parse the field as a date then using something like apply and lambda functions and datetime.strftime() convert it to desireable format example:

df['calldate'].apply(lambda x: datetime.strftime(x, "%Y%m%d%H%M%S")

This assumes you have already parsed the column as a datetime value/feature.

Visit this page to learn the different date formats: http://strftime.org/