This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee  document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                      WCSFTIME(3POSIX)

       The  functionality  described  on  this  reference  page is aligned with the ISO C standard. Any conflict
       between the requirements described  here  and  the  ISO C  standard  is  unintentional.  This  volume  of
       POSIX.1‐2017 defers to the ISO C standard.

       The wcsftime() function shall be equivalent to the strftime() function, except that:

        *  The  argument  wcs  points  to  the  initial  element  of  an array of wide characters into which the
           generated output is to be placed.

        *  The argument maxsize indicates the maximum number of wide characters  to  be  placed  in  the  output
           array.

        *  The  argument  format  is  a  wide-character string and the conversion specifications are replaced by
           corresponding sequences of wide characters.  It is unspecified whether an encoding  error  occurs  if
           the  format  string contains wchar_t values that do not correspond to members of the character set of
           the current locale.

        *  Field widths specify the number of wide characters instead of the number of bytes.

        *  The return value indicates the number of wide characters placed in the output array.

       If copying takes place between objects that overlap, the behavior is undefined.

       No errors are defined.

       Thefollowingsectionsareinformative.

       None.

       None.

       wcsftime — convert date and time to a wide-character string

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

       None.

       If the total number of resulting wide-character codes including the terminating null wide-character  code
       is no more than maxsize, wcsftime() shall return the number of wide-character codes placed into the array
       pointed  to  by  wcs, not including the terminating null wide-character code. Otherwise, zero is returned
       and the contents of the array are unspecified.

strftime()

       The Base Definitions volume of POSIX.1‐2017, <wchar.h>

       #include <wchar.h>

       size_t wcsftime(wchar_t *restrict wcs, size_t maxsize,
           const wchar_t *restrict format, const struct tm *restrict timeptr);