• Daylight Savings Time Ends - Effective November 2, 2008

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      • Quote Vendors
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      • Market Data Operations
      • #
      • Q2008-219
      • Notice Date
      • 16 October 2008
      • Effective Date
      • 02 November 2008

    • Sunday, November 2, 2008, Daylight Savings Time (DST) will end at 2:00 a.m. Please be aware during the week of November 2, 2008, the DST time change will not be updated within the MDP Wire Message Format/Message Timestamp (This format precedes the actual RLC and ITC 2.1 Message Specifications). 

       

      MDP Wire Message Format/Message Timestamp Field

       

      As shown in the following MDP Message Wire Format illustration, the Message Timestamp uses 12:00 a.m. Sunday as its reference time.  Even though the DST change will take place on Sunday, November 2, this information will not be reflected in the Message Timestamp until the following Sunday, November 9.

       

      Field

      Length

      Description

      HEADER

      Message Sequence Number

      4 bytes (binary)

      This represents the sequence number of the message within the published channel.

      Message Timestamp

      4 bytes (binary)

      This represents a timestamp for the publishing of the message. It is represented as the number of milliseconds since Sunday, 12 A.M. (00:00).

      Message Body length

      2 bytes (binary)

      This represents the length of the message body field.

      BODY

      Message Body

       

      RLC – Compressed

      ITC 2.1– Plain text

       

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