//	"Z07:00:00"  Z or ±hh:mm:ss
//
// Within the format string, the underscores in "_2" and "__2" represent spaces
// that may be replaced by digits if the following number has multiple digits,
// for compatibility with fixed-width Unix time formats. A leading zero represents
// a zero-padded value.
//
// The formats __2 and 002 are space-padded and zero-padded
// three-character day of year; there is no unpadded day of year format.
//