Merry Christmas in 4 languages

const a = '\''; void b()/*'; var b:string;{
c */ { /*
c document.fgColor='#ffffff'";
cos(1);print "Merry Christmas" ?>
    17 format('Merry Christmas')
       write(6, 17)
       stop
       end
c */
char *a = "}begin b:='{"; } int main () { /*'; writeln{*/
char cbuf[64]; sprintf(cbuf, "}('Merry Christmas') end. {");
cbuf[29] = '\0'; printf(cbuf+3); return 0; }

Other humor in the GNU Humor Collection.