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 la Fête nationale "The National Celebration" and commonly and legally le 14 juillet "the 14th of July").

The French National Day is the anniversary of Storming of the Bastille on 14 July 1789, a turning point of the French Revolution, as well as the Fête de la Fédération which celebrated the unity of the French people on 14 July 1790.

Celebrations are held throughout France. The oldest and largest regular military parade in Europe is held on the morning of 14 July, on the Champs-Élysées in Paris in front of the President of the Republic, along with other French officials and foreign guests.

Source: Wikipedia