March 1, 1810: David Fisher quotes Valerie Matthews letter from Dariusz Proskurnicki in Poland, "Chopin himself presented his date as the 1st of March, 1810, as presented in his letter dated 1/16/1833 to the Head of the Literary Society in Paris. The same date is given in the letters of his Scottish pupil Jane W. Stirling, saying that "his parents made an error of eight days when they went to the registry office some weeks after his birth."
Juan Revilla quotes Bernard Gavoty, "Frederic Chopin, Charles Scribner’s Sons, NY 1977 for March 1. "This date was given by Chopin himself as told him by his father and this is the date that was celebrated by his family. In a letter to the Societe Litteraire Polonaise of Paris, in a letter dated January 11, 1833, Chopin says he was born March 1, 1810."
January 22, 1810: Modern Astrology 5/1909 gave Jan 22 "from his father's record," same from M. Karosowski "Chopin, Life and Letters," 1906. Library reference points out the discrepancy of many years standing, that of a date of January 22 or February 22, 1810.
February 22, 1810: His B.C. and Baptism were found many years after his death, both written in April 1810, both giving February 22, 1810. All accounts quote his father's record for 6:00 PM.
Guy de Pourtalis "Chopin, Le Poete" gives Feb 22, same in Wemyss and in Sabian Symbols No.201. Biography: Henri Bidou, "Chopin" gave Feb 22, 1810, 6:00 PM, Warsaw.
The baptismal certificate, dated April 23 1810 says he was born February 22, 1810 and the birth certificate, in Polish, written by the parish priest Jan Duchnowsky, says explicitly Feb 22, 1810, and adds the exact hour: 6 p.m.
Further confusion was caused by different evidence, such as the inscription on the urn where his heart is conserved in Warsaw, which reads March 2, 1809. Chopin’s first biographer, Maurizy Karasowski, proposed March 1 1809. The "Biographie universelle des musiciens" by Francoise Fetis, published in Paris in 1835, gives February 8, 1810.
Starkman rectified to 1 March 1810 17.13.40 LMT Asc 7Vir09'