CS1: Julian\u2013Gregorian uncertainty

Hedwiga Reicher (Born Hedwig Reicher; 12 June 1884 – 2 September 1971) was a German actress. Her performances on Broadway were credited with the original spelling of her first name.Reicher was christened Hedwig, but she altered the spelling after she came to the United States because some people called her "Mr. Hedwig". She was half-sister of actor Frank Reicher, sister of actor and screenwriter Ernst Reicher, and daughter of actor Emanuel Reicher. Another brother, Hans Reicher, was a sculptor, and her sister, Elly, was an actress.Reicher's film debut came in The Rubaiyat of Omar Khayyam, produced by Ferdinand Earle.In addition to acting, Reicher produced two plays with her father and in 1921 had a solo production of Monna Vanna at Los Angeles's Little Theater. She also acted in all three.On February 2, 1934, Reicher married concert pianist and music teacher Maurice Zam in Hollywood, California.

Walter Ruttmann (28 December 1887 – 15 July 1941) was a German cinematographer and film director, an important German abstract experimental film maker, along with Hans Richter, Viking Eggeling and Oskar Fischinger. He is best known for directing the semi-documentary 'city symphony' silent film, with orchestral score by Edmund Meisel, in 1927, Berlin: Symphony of a Metropolis. His audio montage Wochenende (Weekend) (1930) is considered a major contribution in the development of audio plays.

Auguste Marie Christine Holl (22 February 1888 – 16 July 1966) was a German actress and singer. Holl was briefly a silent film star during the early Weimar Republic, appearing in productions such as F. W. Murnau's Desire (1921). As of 2021, only one of her films survives.

Charles-Jean Étienne Gustave Nicolas, baron de la Vallée Poussin (French pronunciation: [ʃaʁl ʒɑ̃ etjɛn ɡystav nikɔla baʁɔ̃ də la vale pusɛ̃]; 14 August 1866 – 2 March 1962) was a Belgian mathematician. He is best known for proving the prime number theorem.
The King of Belgium ennobled him with the title of baron.

Virginia Elizabeth Marshall (October 1, 1918 – January 30, 1982), also known as Little Virginia Marshall, was an American child actress in the silent film era between 1924 and 1930.

Pierre Grégoire (9 November 1907 – 8 April 1991) was a Luxembourgish politician in the Christian Social People's Party (CSV), journalist, and writer. Before turning to politics full-time, he wrote for the Luxemburger Wort newspaper.
Before World War II, he organised the development of the CSV's precursor, the Party of the Right, along with Jean Baptiste Esch. He was a CSV Deputy from 1946 onwards, and was the party's secretary-general from 1952 to 1960. He was a member of the Council of Europe from 1956.
He also held several government posts: he was the minister for the Interior, Religion, Arts and Sciences and Transport from 1959 to 1964, then became minister for Cultural Affairs, Education and the Civil Service from 1964 onwards. From 1969 to 1974 he was the president of the Chamber of Deputies.

Théodose Achille Louis Vicomte du Moncel or Théodore du Moncel (6 March 1821 – 16 February 1884) was a prominent French physicist and advocate of the use of electricity. He invented many electrical devices and wrote several books. He was also a proficient artist, making high-quality prints of scientific and cultural interest.He also worked as a popularizer of knowledge on electricity.
In 1879, he founded the journal La lumière électrique.
He is one of the founders of the Société Nationale des Sciences Naturelles et Mathématiques of Cherbourg and was a member of the French Academy of Sciences.He was conseiller général of the Manche département (1861–1870) (Canton of Cherbourg-Octeville-Sud-Ouest).

Antonio Santi Giuseppe Meucci ( may-OO-chee, Italian: [anˈtɔːnjo meˈuttʃi]; 13 April 1808 – 18 October 1889) was an Italian inventor and an associate of Giuseppe Garibaldi, a major political figure in the history of Italy. Meucci is best known for developing a voice-communication apparatus that several sources credit as the first telephone.Meucci set up a form of voice-communication link in his Staten Island, New York, home that connected the second-floor bedroom to his laboratory. He submitted a patent caveat for his telephonic device to the U.S. Patent Office in 1871, but there was no mention of electromagnetic transmission of vocal sound in his caveat. In 1876, Alexander Graham Bell was granted a patent for the electromagnetic transmission of vocal sound by undulatory electric current. Despite the longstanding general crediting of Bell with the accomplishment, the Italian Ministry of Cultural Heritage and Activities supported celebrations of Meucci's 200th birthday in 2008 using the title "Inventore del telefono" (Inventor of the telephone). The U.S. House of Representatives in a resolution in 2002 also acknowledged Meucci's work in the invention of the telephone, although the U.S. Senate did not join the resolution and the interpretation of the resolution is disputed.

Jean Pierre Mégnin (16 January 1828 – 31 December 1905) was a French army veterinarian and entomologist. He is best known for his work with dogs in the field of cynology. He also contributed to the field of forensic entomology. He led experiments which unveiled the eight distinct waves of insect succession on corpses exposed to air. Similarly, he showed two waves of insect succession on corpses that are buried.

Bolo Pasha, originally named Paul Bolo, (September 24, 1867, Marseilles – April 17, 1918, Vincennes) was a Frenchman who was a Levantine financer, traitor, and a German agent. The New York Times wrote that he "circumnavigated the globe, engaged in various curious occupations, participated in many shady schemes." The French secret police and Scotland Yard failed to collect enough evidence to convict him of treason, but he was eventually convicted with the help of evidence collected by the New York Attorney General. He was executed by firing squad on April 17, 1918.