The C Standard, 7.2729.3.1 [ISO/IEC 9899:20112024], provides the following sample implementation of the asctime() function:
...
| [IEEE Std 1003.1:2013] | XSH, System Interfaces, asctime |
| [ISO/IEC 9899:20112024] | 7.2729.3.1, "The asctime Function" |
...