Cheat Sheet - Date(Time) Format Code for Python

# string to datetime
from datetime import datetime
str = '2016-07-02'
dt = datetime.strptime(str, '%Y-%m-%d')

# datetime format string
str = dt.strftime('%Y-%m-%d')

# smart parser
from dateutil.parser import parse
parse('Jan 31, 1997 10:45 PM')
parse('6/12/2011', dayfirst=True)

Type    Description
-----   ------------------------------------------
%Y      4-digit year 
%y      2-digit year
%m      2-digit month [01, 12]
%d      2-digit day [01, 31] 
%H      Hour (24-hour clock) [00, 23] 
%I      Hour (12-hour clock) [01, 12]
%M      2-digit minute [00, 59] 
%S      Second [00, 61] (seconds 60, 61 account for leap seconds) 
%w      Weekday as integer [0 (Sunday), 6]

%U      Week number of the year [00, 53]. 
		Sunday is considered the first day of the week, and days before the first Sunday are “week 0”.
%W      Week number of the year [00, 53]. 
		Monday is considered the first day of the week, and days before the first Monday are “week 0”.
%z      UTC time zone offset as +HHMM or -HHMM, empty if time zone naive 
%F      Shortcut for %Y-%m-%d, for example 2012-4-18 
%D      Shortcut for %m/%d/%y, for example 04/18/12

*Locale-specific date formatting Type
Type    Description
-----   ------------------------------------------
%a      Abbreviated weekday name
%A      Full weekday name
%b      Abbreviated month name
%B      Full month name
%c      Full date and time, for example ‘Tue 01 May 2012 04:20:57 PM’
%p      Locale equivalent of AM or PM
%x      Locale-appropriate formatted date; e.g. in US May 1, 2012 yields ’05/01/2012’
%X      Locale-appropriate time, e.g. ’04:24:12 PM’