François-Daniel-Abraham Vaucher was born on 21st March, 1750 in Fleurier. Jean-Jacques Dumouchel was born on 21st March, 1761 in Saint-Nicolas d'Aliermont. François Legrand was born on 21st March, 1796 in Saint-Nicolas d'Aliermont. Joséphine-Florence Daire was born on 21st March, 1801 in Saint-Pierre-des-Jonquières, Seine-Maritime. Pierre-Hubert Hurel was born on 21st March, 1801 in Saint-Nicolas d'Aliermont. Jules-Adamir Huguenin-Dumittan was born on 21st March, 1802 in La Chaux-du-Milieu. Eugêne-Julien Lefebvre was born on 21st March, 1833 in Saint-Nicolas d'Aliermont. Jules Huguenin (Bergenat) was born on 21st March, 1850 in Le Locle. Marie-Aline Debure was born on 21st March, 1888 in Saint-Aubin-le-Cauf near Saint-Nicolas d'Aliermont. Günter Blümlein was born on 21st March, 1943 in Nuremberg.
Moïse Huguenin died on 21st March, 1762 in La Chaux-de-Fonds. Benjamin-Désiré Dumouchel died on 21st March, 1847 in Saint-Nicolas d'Aliermont. Charles-Louis Binet died on 21st March, 1864 in Saint-Nicolas d'Aliermont. Frédéric Huguenin died on 21st March, 1869 in La Chaux-du-Milieu. Theodor Beyer died on 21st March, 1870. Jacques Ancel died on 21st March, 1876 in Saint-Nicolas d'Aliermont. Constance-Mélanie Sauteur died on 21st March, 1878 in Saint-Nicolas d'Aliermont. Henri Grandjean died on 21st March, 1889 in Le Locle. Harlow E. Bundy died on 21st March, 1916. Henriette-Paschale Morin died on 21st March, 1977 in Dieppe.