The date of translation of the source file:
a character string literal of the form
"Mmm dd yyyy",
where the names of the months are the same as those generated
and the first character of
is a space character if the value is less than 10.
If the date of translation is not available,
an implementation-defined valid date
shall be supplied.
The integer literal 1, intended to indicate that, in the encoding for
wchar_t, a member of the basic character set need not have a code value equal to
its value when used as the lone character in an ordinary character literal.