China holds a national day of mourning for martyrs who died in the fight against the novel coronavirus disease outbreak.

A national day of mourning is a day, or one of several days, marked by mourning and memorial activities observed among the majority of a country's populace. They are designated by the national government. Such days include those marking the death or funeral of a renowned individual or individuals from that country or elsewhere or the anniversary of such a death or deaths, wartime commemorations, or the occurrence or anniversary of a significant disaster either in the country or in another country. Flying a national or military flag of that country at half-mast is a common symbol.