Ordering in the C and POSIX is according to the code point order of ISO/IEC 646:1993.
The C and POSIX locale uses normal classification of characters, such as letters, digits, punctuation and control characters, and letters are mapped between uppercase and lowercase.
The decimal separator is FULL STOP <.>
The thousands separator is void.
There is no grouping of large numbers.
| Weekday name | Short weekday name |
| Sunday | Sun |
| Monday | Mon |
| Tuesday | Tue |
| Wednesday | Wed |
| Thursday | Thu |
| Friday | Fri |
| Saturday | Sat |
| Month name | Short month name |
| January | Jan |
| February | Feb |
| March | Mar |
| April | Apr |
| May | May |
| June | Jun |
| July | Jul |
| August | Aug |
| September | Sep |
| October | Oct |
| November | Nov |
| December | Dec |
| Abbreviated day and time: | Tue Jun 7 23:22:33 1994 |
| Numeric date: | 06/23/99 |
| Time: | 18:06:20 |
| 12-hour time: | 06:06:20 PM |
The abbreviations used for before or after noon are "AM" and "PM" respectively.
| Yes expressions: strings starting with | "Y" or "y" | (= Yes) |
| No expressions: strings starting with | "N" or "n" | (= No) |
End of Narrative Cultural Specification.