| Format | Output | Description |
|---|---|---|
| %a | Sun, Mon, …, Sat (en_US); | Weekday as locale’s abbreviated name. |
| %A | Sunday, Monday, …, Saturday (en_US); | Weekday as locale’s full name. |
| %w | 0, 1, …, 6 | Weekday as a decimal number, where 0 is Sunday and 6 is Saturday. |
| %d | 01, 02, …, 31 | Day of the month as a zero-padded decimal number. |
| %b | Jan, Feb, …, Dec (en_US); | Month as locale’s abbreviated name. |
| %B | January, February, …, December (en_US); | Month as locale’s full name. |
| %m | 01, 02, …, 12 | Month as a zero-padded decimal number. |
| %y | 00, 01, …, 99 | Year without century as a zero-padded decimal number. |
| %Y | 0001, 0002, …, 2013, 2014, …, 9998, 9999 | Year with century as a decimal number. |
| %H | 00, 01, …, 23 | Hour (24-hour clock) as a zero-padded decimal number. |
| %I | 01, 02, …, 12 | Hour (12-hour clock) as a zero-padded decimal number. |
| %p | AM, PM (en_US); | Locale’s equivalent of either AM or PM. |
| %M | 00, 01, …, 59 | Minute as a zero-padded decimal number. |
| %S | 00, 01, …, 59 | Second as a zero-padded decimal number. |
| %f | 000000, 000001, …, 999999 | Microsecond as a decimal number, zero-padded to 6 digits. |
| %z | (empty), +0000, -0400, +1030, +063415, -030712.345216 | UTC offset in the form ±HHMM[SS[.ffffff]] (empty string if the object is naive). |
| %Z | (empty), UTC, GMT | Time zone name (empty string if the object is naive). |
| %j | 001, 002, …, 366 | Day of the year as a zero-padded decimal number. |
| %U | 00, 01, …, 53 | 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 | 00, 01, …, 53 | 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. |
| %c | Tue Aug 16 21:30:00 1988 (en_US); | Locale’s appropriate date and time representation. |
| %x | 08/16/88 (None); | Locale’s appropriate date representation. |
| %X | 21:30:00 (en_US); | Locale’s appropriate time representation. |
| %% | % | A literal '%' character. |
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Source: https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes
Thank you! This is a very nice, concise summary.