The following formatting codes are available: d - prints the days component D - prints the zero-padded days component (00000000..10675199) h - prints the zero-padded hours component (00..23) m - prints the zero-padded minutes component (00..59) s - prints the zero-padded seconds component (00..59) f - prints the zero-padded fractional seconds (000..999) u - prints the zero-padded fractional seconds (000000..999999) n - prints the zero-padded fractional seconds (000000000..999999999)