Date and time formatting supported by the C runtime library function: strftime
| Code | Replacement string |
|---|---|
| %a | Abbreviated weekday name in the locale |
| %A | Full weekday name in the locale |
| %b | Abbreviated month name in the locale |
| %B | Full month name in the locale |
| %c | Date and time representation appropriate for locale |
| %C | The year divided by 100 and truncated to an integer, as a decimal number (00−99) |
| %d | Day of month as a decimal number (01 - 31) |
| %D | Equivalent to %m/%d/%y |
| %e | Day of month as a decimal number (1 - 31), where single digits are preceded by a space |
| %F | Equivalent to %Y-%m-%d |
| %g | The last 2 digits of the ISO 8601 week-based year as a decimal number (00 - 99) |
| %G | The ISO 8601 week-based year as a decimal number |
| %h | Abbreviated month name (equivalent to %b) |
| %H | Hour in 24-hour format (00 - 23) |
| %I | Hour in 12-hour format (01 - 12) |
| %j | Day of the year as a decimal number (001 - 366) |
| %m | Month as a decimal number (01 - 12) |
| %M | Minute as a decimal number (00 - 59) |
| %n | A newline character (\n) |
| %p | The locale's A.M./P.M. indicator for 12-hour clock |
| %r | The locale's 12-hour clock time |
| %R | Equivalent to %H:%M |
| %S | Second as a decimal number (00 - 59) |
| %t | A horizontal tab character (\t) |
| %T | Equivalent to %H:%M:%S, the ISO 8601 time format |
| %u | ISO 8601 weekday as a decimal number (1 - 7; Monday is 1) |
| %U | Week number of the year as a decimal number (00 - 53), where the first Sunday is the first day of week 1 |
| %V | ISO 8601 week number as a decimal number (00 - 53) |
| %w | Weekday as a decimal number (0 - 6; Sunday is 0) |
| %W | Week number of the year as a decimal number (00 - 53), where the first Monday is the first day of week 1 |
| %x | Date representation for the locale |
| %X | Time representation for the locale |
| %y | Year without century, as decimal number (00 - 99) |
| %Y | Year with century, as decimal number |
| %z | The offset from UTC in ISO 8601 format; no characters if time zone is unknown |
| %Z | Either the locale's time-zone name or time zone abbreviation, depending on registry settings; no characters if time zone is unknown |
| %% | Percent sign |
In addition, there are some Microsoft Windows-specific modifiers and GNU/*nix specific modifiers that may be used.