7.4. Datetime Directives

Similar in almost all programming language
Some minor differences like in JavaScript minutes are i, not M
Source: [1]

Table 7.3. Frequently used date parsing directives. Examples for `dt = datetime(1969, 7, 21, 2, 56, 15, tzinfo=timezone.utc)`
Usage	Result	Description
`dt.strftime('%Y')`	`'1969'`	Year with century as a decimal number
`dt.strftime('%m')`	`'07'`	Month as a zero-padded decimal number
`dt.strftime('%d')`	`'21'`	Day of the month as a zero-padded decimal number
`dt.strftime('%H')`	`'02'`	Hour (24-hour clock) as a zero-padded decimal number
`dt.strftime('%M')`	`'56'`	Minute as a zero-padded decimal number
`dt.strftime('%S')`	`'15'`	Second as a zero-padded decimal number
`dt.strftime('%f')`	`'000000'`	Microsecond as a decimal number, zero-padded on the left
`dt.strftime('%Z')`	`'UTC'`	Time zone name (empty string if the object is naive)
`dt.strftime('%z')`	`'+0000'`	UTC offset in the form +HHMM or -HHMM (empty string if the object is naive)
`dt.strftime('%A')`	`'Monday'`	Weekday as locale's full name
`dt.strftime('%a')`	`'Mon'`	Weekday as locale's abbreviated name
`dt.strftime('%B')`	`'July'`	Month as locale's full name
`dt.strftime('%b')`	`'Jul'`	Month as locale's abbreviated name
`dt.strftime('%I')`	`'02'`	Hour (12-hour clock) as a zero-padded decimal number
`dt.strftime('%p')`	`'AM'`	Locale's equivalent of either AM or PM

7.4.1. Frequently Used

%Y - Year with century as a decimal number
%m - Month as a zero-padded decimal number
%d - Day of the month as a zero-padded decimal number
%H - Hour (24-hour clock) as a zero-padded decimal number
%M - Minute as a zero-padded decimal number
%S - Second as a zero-padded decimal number
%f - Microsecond as a decimal number, zero-padded on the left
%Z - Time zone name (empty string if the object is naive)
%z - UTC offset in the form +HHMM or -HHMM (empty string if the object is naive)
%A - Weekday as locale's full name
%a - Weekday as locale's abbreviated name
%B - Month as locale's full name
%b - Month as locale's abbreviated name
%I - Hour (12-hour clock) as a zero-padded decimal number
%p - Locale's equivalent of either AM or PM

Examples:

%Y-%m-%d                    # 1969-07-21
%H:%M:%S                    # 02:56:15
%Y-%m-%d %H:%M:%S.%f %Z     # 1969-07-21 02:56:15.123456 UTC
%A, %B %d, %Y at %I:%M %p   # Monday, July 21, 1969 at 02:56 AM

7.4.2. Year

%Y - Year with century as a decimal number
%y - Year without century as a zero-padded decimal number
%G - ISO 8601 year with century representing the year that contains the greater part of the ISO week (%V)

%Y - Year with century as a decimal number

%y examples:

%G examples:

7.4.3. Month

%m - Month as a zero-padded decimal number
%B - Month as locale's full name
%b - Month as locale's abbreviated name

%m - Month as a zero-padded decimal number:

%B - Month as locale's full name:

January
February
November
December

%b - Month as locale's abbreviated name:

Jan
Feb
Nov
Dec

7.4.4. Day

%d - Day of the month as a zero-padded decimal number
%a - Weekday as locale's abbreviated name
%A - Weekday as locale's full name
%u - ISO 8601 weekday as a decimal number where 1 is Monday
%w - Weekday as a decimal number, where 0 is Sunday and 6 is Saturday
%j - Day of the year as a zero-padded decimal number

%d - Day of the month as a zero-padded decimal number:

%a - Weekday as locale's abbreviated name:

Mon
Tue
Wed
Thu
Fri
Sat
Sun

%A - Weekday as locale's full name:

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

%u - ISO 8601 weekday as a decimal number where 1 is Monday:

%w - Weekday as a decimal number, where 0 is Sunday and 6 is Saturday:

%j - Day of the year as a zero-padded decimal number:

7.4.5. Hour

%H - Hour (24-hour clock) as a zero-padded decimal number
%I - Hour (12-hour clock) as a zero-padded decimal number
%p - Locale's equivalent of either AM or PM

%H - Hour (24-hour clock) as a zero-padded decimal number:

00
01
23

%I - Hour (12-hour clock) as a zero-padded decimal number:

01
02
12

%p - Locale's equivalent of either AM or PM:

AM
PM

7.4.6. Minute

%M - Minute as a zero-padded decimal number

%M - Minute as a zero-padded decimal number:

00
01
59

7.4.7. Seconds

%S - Second as a zero-padded decimal number

%S - Second as a zero-padded decimal number:

00
01
59

7.4.8. Micro Seconds

%f - Microsecond as a decimal number, zero-padded on the left

%f - Microsecond as a decimal number, zero-padded on the left:

000000
000001
999999

7.4.9. Timezone

%Z - Time zone name (empty string if the object is naive)
%z - UTC offset in the form +HHMM or -HHMM (empty string if the object is naive)
%:z - UTC offset in the form ±HH:MM[:SS[.ffffff]] (empty string if the object is naive).

%Z - Time zone name (empty string if the object is naive):

UTC
EST
CST

%z - UTC offset in the form +HHMM or -HHMM (empty string if the object is naive):

+0000
-0400
+1030

%:z - UTC offset in the form ±HH:MM[:SS[.ffffff]] (empty string if the object is naive):

+00:00
-04:00
+10:30

7.4.10. Week

%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
%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
%V - ISO 8601 week as a decimal number with Monday as the first day of the week. Week 01 is the week containing Jan 4

%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:

%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:

%V - ISO 8601 week as a decimal number with Monday as the first day of the week. Week 01 is the week containing Jan 4:

7.4.11. Presets

%c - Locale's appropriate date and time representation
%x - Locale's appropriate date representation
%X - Locale's appropriate time representation

%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:

08/16/1988 (en_US)
16.08.1988 (de_DE)

%X - Locale's appropriate time representation:

21:30:00

7.4.12. Other

%% - A literal % character

%% - A literal % character: