In 681, part of the Bulgars settled in the Balkan peninsula and established First Bulgarian Empire.
Additionally, the same dating system is used in a marginal note in a manuscript by 10th century monk Tudor Doksov and in the Chatalar Inscription by the 9th-century Bulgaria ruler Omurtag (r. 814–831), who also provides the Byzantine imperial dating equivalent (the indiction).
[2] The reading, along with the "cyclic calendar" interpretation itself, was originally proposed by Finnish Slavist Jooseppi Julius Mikkola in 1913.
Later, there have been various modifications and elaborations during the 20th century by scholars such as Géza Fehér, Omeljan Pritsak, Mosko Moskov and other scientists.
The following list is based on Mosko Moskov's and description of the average mainstream interpretation, as well as his own reconstruction, and takes into account the existing disagreements:[4] Years: The following comparison table was made based on Omeljan Pritsak's analysis.