Directive | Meaning | Example
%a | Abbreviated weekday name. | Sun, Mon, ...
%A | Full weekday name. | Sunday, Monday, ...
%w | Weekday as a decimal number. | 0, 1, ..., 6
%d | Day of the month as a zero-padded decimal. | 01, 02, ..., 31
%-d | Day of the month as a decimal number. | 1, 2, ..., 30
%b | Abbreviated month name. | Jan, Feb, ..., Dec
%B | Full month name. | January, February, ...
%m | Month as a zero-padded decimal number. | 01, 02, ..., 12
%-m | Month as a decimal number. | 1, 2, ..., 12
%y | Year without century as a zero-padded decimal number. | 00, 01, ..., 99
%-y | Year without century as a decimal number. | 0, 1, ..., 99
%Y | Year with century as a decimal number. | 2013, 2019 etc.
%H | Hour (24-hour clock) as a zero-padded decimal number. | 00, 01, ..., 23
%-H | Hour (24-hour clock) as a decimal number. | 0, 1, ..., 23
%I | Hour (12-hour clock) as a zero-padded decimal number. | 01, 02, ..., 12
%-I | Hour (12-hour clock) as a decimal number. | 1, 2, ... 12
%p | Locale’s AM or PM. | AM, PM
%M | Minute as a zero-padded decimal number. | 00, 01, ..., 59
%-M | Minute as a decimal number. | 0, 1, ..., 59
%S | Second as a zero-padded decimal number. | 00, 01, ..., 59
%-S | Second as a decimal number. | 0, 1, ..., 59
%f | Microsecond as a decimal number, zero-padded on the left. | 000000 - 999999
%z | UTC offset in the form +HHMM or -HHMM. |
%Z | Time zone name. |
%j | Day of the year as a zero-padded decimal number. | 001, 002, ..., 366
%-j | Day of the year as a decimal number. | 1, 2, ..., 366
%U | Week number of the year (Sunday as the first day of the week). All days in a new year preceding the first Sunday are considered to be in week 0. | 00, 01, ..., 53
%W | Week number of the year (Monday as the first day of the week). All days in a new year preceding the first Monday are considered to be in week 0. | 00, 01, ..., 53
%c | Locale’s appropriate date and time representation. | Mon Sep 30 07:06:05 2013
%x | Locale’s appropriate date representation. | 09/30/13
%X | Locale’s appropriate time representation. | 07:06:05
%% | A literal '%' character. | %