POSIX strftime:
strftime: If you want your code to be portable, your format ("fmt") argument should use only the conversion specifiers defined by the ANSI C standard (C89, to play safe). These are aAbBcdHIjmMpSUwWxXyYZ%. But even then, the results of some of the conversion specifiers are non-portable.
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No matter how great and destructive your problems may seem now, remember, you've probably only seen the tip of them. [1]

In reply to Re: strftime Windows/Solaris compatibility question by andreas1234567
in thread strftime Windows/Solaris compatibility question by rovf

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