Python中的日期格式

https://docs.python.org/3/library/datetime.html#strftime-and-strptime-behavior

类型	Directive	Meaning	Example
年份	%Y	Year with century as a decimal number.	0001, 0002, …, 2013, 2014, …, 9998, 9999
年份	%y	Year without century as a zero-padded decimal number.	00, 01, …, 99
月份	%m	Month as a zero-padded decimal number.	01, 02, …, 12
月份	%b	Month as locale’s abbreviated name.	Jan, Feb, …, Dec (en_US);Jan, Feb, …, Dez (de_DE)
月份	%B	Month as locale’s full name.	January, February, …, December (en_US);Januar, Februar, …, Dezember (de_DE)
日期	%d	Day of the month as a zero-padded decimal number.	01, 02, …, 31
星期	%a	Weekday as locale’s abbreviated name.	Sun, Mon, …, Sat (en_US);So, Mo, …, Sa (de_DE)
星期	%A	Weekday as locale’s full name.	Sunday, Monday, …, Saturday (en_US);Sonntag, Montag, …, Samstag (de_DE)
星期	%w	Weekday as a decimal number, where 0 is Sunday and 6 is Saturday.	0, 1, …, 6
小时	%H	Hour (24-hour clock) as a zero-padded decimal number.	00, 01, …, 23
小时	%I	Hour (12-hour clock) as a zero-padded decimal number.	01, 02, …, 12
分钟	%M	Minute as a zero-padded decimal number.	00, 01, …, 59
秒	%S	Second as a zero-padded decimal number.	00, 01, …, 59
上/下午	%p	Locale’s equivalent of either AM or PM.	AM, PM (en_US);am, pm (de_DE)
时区	%Z	Time zone name (empty string if the object is naive).	(empty), UTC, EST, CST
UTC	%z	UTC offset in the form ±HHMM[SS[.ffffff]] (empty string if the object is naive).	(empty), +0000, -0400, +1030, +063415, -030712.345216
一年中的天数	%j	Day of the year as a zero-padded decimal number.	001, 002, …, 366
一年中的周数	%U	Week number of the year (Sunday as the first day of the week) as a zero padded decimal number. All days in a new year preceding the first Sunday are considered to be in week 0.	00, 01, …, 53
一年中的周数	%W	Week number of the year (Monday as the first day of the week) as a decimal number. All days in a new year preceding the first Monday are considered to be in week 0.	00, 01, …, 53
	%f	Microsecond as a decimal number, zero-padded on the left.	000000, 000001, …, 999999
	%c	Locale’s appropriate date and time representation.	Tue Aug 16 21:30:00 1988 (en_US);Di 16 Aug 21:30:00 1988 (de_DE)
	%x	Locale’s appropriate date representation.	08/16/88 (None);08/16/1988 (en_US);16.08.1988 (de_DE)
	%X	Locale’s appropriate time representation.	21:30:00 (en_US);21:30:00 (de_DE)
	%%	A literal '%' character.	%