Convert string date to timestamp in Python

>>> import time
>>> import datetime
>>> s = "01/12/2011"
>>> time.mktime(datetime.datetime.strptime(s, "%d/%m/%Y").timetuple())
1322697600.0

I use ciso8601, which is 62x faster than datetime's strptime.

t = "01/12/2011"
ts = ciso8601.parse_datetime(t)
# to get time in seconds:
time.mktime(ts.timetuple())

You can learn more here.

>>> int(datetime.datetime.strptime('01/12/2011', '%d/%m/%Y').strftime("%s"))
1322683200

To convert the string into a date object:

from datetime import date, datetime

date_string = "01/12/2011"
date_object = date(*map(int, reversed(date_string.split("/"))))
assert date_object == datetime.strptime(date_string, "%d/%m/%Y").date()

The way to convert the date object into POSIX timestamp depends on timezone. From Converting datetime.date to UTC timestamp in Python:

• date object represents midnight in UTC

  import calendar
  
  timestamp1 = calendar.timegm(utc_date.timetuple())
  timestamp2 = (utc_date.toordinal() - date(1970, 1, 1).toordinal()) * 24*60*60
  assert timestamp1 == timestamp2
  

• date object represents midnight in local time

  import time
  
  timestamp3 = time.mktime(local_date.timetuple())
  assert timestamp3 != timestamp1 or (time.gmtime() == time.localtime())
  

The timestamps are different unless midnight in UTC and in local time is the same time instance.