The date of the National day is traditionally determined by the reigning Prince.
National day is typically celebrated with fireworks over the harbour the evening before and a mass in the St. Nicholas Cathedral the next morning.
Knights of Malta, distinguished ambassadors, consuls and state officials wear medal-laden uniforms as they congregate in the Saint Nicholas Cathedral after the mass.
The Princely Family of Monaco is expected to show up on national day.
The birth of Albert II's children has been celebrated in a similar fashion as a national day and 7 January 2015 was declared a public holiday (one-time only).