Generalized Time Format. Generalized time represents the values of year, month, day, hour, minutes, seconds and fractions of a second in any of three forms:
Local time "YYYYMMDDHHMMSS.fff", where fff is optional and is fractions of a second
Greenwich Mean Time (UTC) "YYYYMMDDHHMMSS.fffZ", Z indicates Greenwich Mean Time
Difference between local and UTC time, "YYYYMMDDHHMMSS.fff+-HHMM", the +HHMM or -HHMM represents the time differential between the local and Greenwich Mean Times.
UTC Time Format. UTC format represents the values of year (2 digit), month, day, hour, minutes and optionally seconds.
Local time "YYMMDDHHMMSS", where seconds (SS) is optional
Greenwich Mean Time (UTC), "YYMMDDHHMMSSZ", seconds (SS) is optional and Z represents Greenwich Mean Time
Difference between local and UTC time, "YYMMDDHHMMSS+-HHMM", seconds (SS) is optional and +HHMM or -HHMM represents the time differential between local and Greenwich Mean Times.