Bastille Day
Bastille Day is the common name given in English-speaking countries to the national day of France, which is celebrated on 14 July each year. In French, it is formally called ' (; "The National Celebration") and commonly and legally ' (; "the 14th of July").
UN French Language Day
UN French Language Day is observed annually on 20 March. 
The event was established by UN's Department of Public Information in 2010 "to celebrate multilingualism and cultural diversity as well as to promote equal use of all six official languages throughout the Organization".