Shift time in python using datetime & timedelta:

import datetime
 from datetime import timedelta

 date1 = datetime.datetime.utcnow()
 # output of date1: datetime.datetime(2017, 11, 8, 10, 24, 25, 19492)
 date2 = date1 + timedelta(days=1)
 # output of date2: datetime.datetime(2017, 11, 9, 10, 24, 25, 19492)

To get your new date in EPOCH:

at_epoch = (date2 - datetime.datetime(1970, 1, 1)).total_seconds()
 # output of subtract: 1510223065.019492

To turn EPOCH to datetime:

import time

 from_epoch = time.localtime(1510223065.019492)
 # output: time.struct_time(tm_year=2017, tm_mon=11, tm_mday=9, tm_hour=13, tm_min=54, tm_sec=25, tm_wday=3, tm_yday=313, tm_isdst=0)

 formatted_date = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1510223065.019492))
 # output: 2017-11-09 13:54:25

#python #epoch #datetime #time #timedelta #strftime

It is always a best practice to store dates in UTC. Do not ever store dates in your local timezone in which you will go to hell in your programming experience!

Given that you have saved your dates in UTC and would like to convert them into Asia/Tehran date in Python do like below:

date_format = '%Y-%m-%d %H:%M:%S'
 local_tz = pytz.timezone('Asia/Tehran')
 submit_time = dateutil.parser.parse(utc_date)
 submit_time = submit_time.replace(tzinfo=pytz.utc).astimezone(local_tz)
 output = submit_time.strftime(date_format)

#python #date #utc #strftime #dateutil #timezone #pytz