How to add time to date time?

assuming your date2 is a string, then you need to convert it to datetime object

import datetime
date2 = '2019-04-17 22:00:00'
date2_object = datetime.datetime.strptime(date2,'%Y-%m-%d %H:%M:%S')
date = date2_object + datetime.timedelta(hours=6)

if date2 is already a datetime object, you can simply do:

date = date2 + datetime.timedelta(hours=6)