This is one of a series of postings of important classical music dates, from the 17th century to the present. Included are the date and location of the birth and death of composers, and the premiere date and location of the first public performance of works. When the premiere date and location is unknown, the date or year of completion of the work is given. Though reasonably comprehensive, this is a subjective list, so the choice of composers and works is mine. If you find any errors, or if you can offer a premiere date and location for a work where only the completion date or year is listed, please post a comment here.
1800
March 28 – Trumpet Concerto in E-flat major, Hob. VIIe/1 by Joseph Haydn (1732-1809) was first performed in Vienna, Austria
April 2 – Symphony No. 1 in C major, op. 21 by Ludwig van Beethoven (1770-1827) was first performed in Vienna, Austria
1801
Ludwig van Beethoven (1770-1827) completed Piano Sonata No. 14 in C♯ minor, op. 27, no. 2 “Moonlight”
Ludwig van Beethoven (1770-1827) completed Romance No. 1 in G major for violin and orchestra, op. 40
1802
February 20 – Charles Auguste de Bériot (1802-1870) was born in Leuven, Belgium
1803
Joseph Haydn (1732-1809) left uncompleted his last composition, the String Quartet No. 68 in D minor, op. 103, Hob. III:83
April 5 – Symphony No. 2 in D major, op. 36 by Ludwig van Beethoven (1770-1827) was first performed in Vienna, Austria
April 5 – Piano Concerto No. 3 in C minor, op. 37 by Ludwig van Beethoven (1770-1827) was first performed in Vienna, Austria
December 11 – Hector Berlioz (1803-1869) was born in La Côte-Saint-André, France
1804
Ludwig van Beethoven (1770-1827) completed Piano Sonata No. 21 in C major, op. 53 “Waldstein”
May 31 – Louise Farrenc (1804-1875) was born in Paris, France
June 1 – Mikhail Glinka (1804-1857) was born in Novospasskoye, Russia
1805
Ludwig van Beethoven (1770-1827) completed Piano Sonata No. 23 in F minor, op. 57 “Appassionata”
April 7 – Symphony No. 3 in E♭ major, op. 55 “Eroica” by Ludwig van Beethoven (1770-1827) was first performed in Vienna, Austria
May 28 – Luigi Boccherini (1743-1805) died in Madrid, Spain
1806
March 29 – Leonore Overture No. 3 in C major, from the opera Fidelio, op. 72, by Ludwig van Beethoven (1770-1827) was first performed in Vienna, Austria
December 23 – Violin Concerto in D major, op. 61 by Ludwig van Beethoven (1770-1827) was first performed in Vienna, Austria
1807
March – Symphony No. 4 in B♭ major, op. 60 by Ludwig van Beethoven (1770-1827) was first performed in Vienna, Austria
1808
December 22 – Symphony No. 5 in C minor, op. 67 by Ludwig van Beethoven (1770-1827) was first performed in Vienna, Austria
1809
February 3 – Felix Mendelssohn (1809-1847) was born in Hamburg, Germany
May 31 – Joseph Haydn (1732-1809) died in Vienna, Austria