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.