| a | 'a.m.' or 'p.m.' (Note that this is slightly different than PHP's output, because this includes periods to match Associated Press style.) | 'a.m.' | 
| A | 'AM' or 'PM'. | 'AM' | 
| b | Month, textual, 3 letters, lowercase. | 'jan' | 
| B | Not implemented. |  | 
| c | ISO 8601 format. (Note: unlike others formatters, such as "Z", "O" or "r", the "c" formatter will not add timezone offset if value is a naive datetime.) | 2008-01-02T10:30:00.000123+02:00, or 2008-01-02T10:30:00.000123 if the datetime is naive | 
| d | Day of the month, 2 digits with leading zeros. | '01' to '31' | 
| D | Day of the week, textual, 3 letters. | 'Fri' | 
| E | Month, locale specific alternative representation usually used for long date representation. | 'listopada' (for Polish locale, as opposed to 'Listopad') | 
| f | Time, in 12-hour hours and minutes, with minutes left off if they're zero. Proprietary extension. | '1', '1:30' | 
| F | Month, textual, long. | 'January' | 
| g | Hour, 12-hour format without leading zeros. | '1' to '12' | 
| G | Hour, 24-hour format without leading zeros. | '0' to '23' | 
| h | Hour, 12-hour format. | '01' to '12' | 
| H | Hour, 24-hour format. | '00' to '23' | 
| i | Minutes. | '00' to '59' | 
| I | Not implemented. |  | 
| j | Day of the month without leading zeros. | '1' to '31' | 
| l | Day of the week, textual, long. | 'Friday' | 
| L | Boolean for whether it's a leap year. | True or False | 
| m | Month, 2 digits with leading zeros. | '01' to '12' | 
| M | Month, textual, 3 letters. | 'Jan' | 
| n | Month without leading zeros. | '1' to '12' | 
| N | Month abbreviation in Associated Press style. Proprietary extension. | 'Jan.', 'Feb.', 'March', 'May' | 
| O | Difference to Greenwich time in hours. | '+0200' | 
| P | Time, in 12-hour hours, minutes and 'a.m.'/'p.m.', with minutes left off if they're zero and the special-case strings 'midnight' and 'noon' if appropriate. Proprietary extension. | '1 a.m.', '1:30 p.m.', 'midnight', 'noon', '12:30 p.m.' | 
| r | RFC 2822 formatted date. | 'Thu, 21 Dec 2000 16:01:07 +0200' | 
| s | Seconds, 2 digits with leading zeros. | '00' to '59' | 
| S | English ordinal suffix for day of the month, 2 characters. | 'st', 'nd', 'rd' or 'th' | 
| t | Number of days in the given month. | 28 to 31 | 
| T | Time zone of this machine. | 'EST', 'MDT' | 
| u | Microseconds. | 0 to 999999 | 
| U | Seconds since the Unix Epoch (January 1 1970 00:00:00 UTC). |  | 
| w | Day of the week, digits without leading zeros. | '0' (Sunday) to '6' (Saturday) | 
| W | ISO-8601 week number of year, with weeks starting on Monday. | 1, 53 | 
| y | Year, 2 digits. | '99' | 
| Y | Year, 4 digits. | '1999' | 
| z | Day of the year. | 0 to 365 | 
| Z | Time zone offset in seconds. The offset for timezones west of UTC is always negative, and for those east of UTC is always positive. | -43200 to 43200 |