Original: The year 193 opened with the murder of Commodus on New Year's Eve, 31 December 192 and the proclamation of the City Prefect Pertinax as Emperor on New Year's Day, 1 January 193.
Simplified: The year 193 opened with the murder of Commodus on New Year's Eve, 31 December 192. The City Prefect Pertinax was proclaimed Emperor on New Year's Day, 1 January 193.