/sys$common/syshlp/helplib.hlb CC, Run-time functions, strptime  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Converts a character string into date and time values stored in a
  tm structure.  Conversion is controlled by a format string.

  Syntax:

       #include <time.h>

       char *strptime (const char *buf, const char *format, struct tm
       *timeptr);