The second and final edition of the Code of Justinian comes into effect in the Byzantine Empire.

Year 534 (DXXXIV) was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Iustinianus and Paulinus. The denomination 534 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

The Code of Justinian is one part of the Corpus Juris Civilis, the codification of Roman law ordered early in the 6th century AD by Justinian I, who was Eastern Roman emperor in Constantinople. Two other units, the Digest and the Institutes, were created during his reign. The fourth part, the Novellae Constitutiones, was compiled unofficially after his death but is now also thought of as part of the Corpus Juris Civilis.

December 30 is the 364th day of the year in the Gregorian calendar; one day remains until the end of the year.