String.Format(@"{0:yyyy-MM-dd}", DateTime.Now); // 2009-01-30
String.Format(@"{0:tt hh:mm:ss}", DateTime.Now); // 오전 01:47:33
String.Format(@"{0:yyyy-MM-dd tt hh:mm:ss}", DateTime.Now); // 2009-01-30 오전 01:48:11
String.Format(CultureInfo.GetCultureInfo("en-US"), @"{0:tt hh:mm:ss}", DateTime.Now); // AM 04:30:44
String.Format(CultureInfo.GetCultureInfo("ko-KR"), @"{0:tt hh:mm:ss}", DateTime.Now); // 오후 03:03:02
String.Format(CultureInfo.GetCultureInfo("ja-JP"), @"{0:tt hh:mm:ss}", DateTime.Now)
