Type: UTCTimestamp
Time of message transmission (always expressed in UTC (Universal Time Coordinated, also known as “GMT”)
Added in protocol FIX.2.7
See in: FIX.4.0, FIX.4.1, FIX.4.2, FIX.4.3, FIX.5.0, FIX.5.0SP1, FIX.5.0SP2, FIX.5.0SP2 EP240, FIXT.1.1.