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In communications messages, a date-time group (DTG) is a set of characters, usually in a prescribed format, used to express the year, the month, the day of the month, the hour of the day, the minute of the hour, and the time zone, if different from Coordinated Universal Time (UTC). The order in which these elements are presented may vary. The DTG is usually placed in the header of the message. One example is " (UTC)". The DTG may indicate either the date and time a message was dispatched by a transmitting station or the date and time it was handed into a transmission facility by a user or originator for dispatch. The DTG may be used as a message identifier if it is unique for each message. The DTG is used in message traffic. EXAMPLE: Ø9163ØZ JUL 11 represents 163Ø GMT on 9 July 2Ø11. == See also== *Calendar date *ISO 8601 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Date-time group」の詳細全文を読む スポンサード リンク
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