begin with the magic characters "TZif" to identify then as
timezone information files,
followed by a character identifying the version of the file's format
-(as of 2005, either an ASCII NUL ('\\0') or a '2')
+(as of 2005, either an ASCII NUL (\(aq\\0\(aq) or a \(aq2\(aq)
followed by fifteen bytes containing zeros reserved for future use,
followed by six four-byte values of type
.IR long ,