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.
1761
Joseph Haydn (1732-1809) completed Symphony No. 6 in D major, Hob. I:6 “Le matin”
1762
Antonio Sarrier (1725-1762) died in Spain (specific location, unknown)
1764
Joseph Haydn (1732-1809) completed Symphony No. 22 in E-flat Major, Hob. I:22 “The Philosopher”
After October 25 – Wolfgang Amadeus Mozart (1756-1791) wrote Violin Sonata No. 6 in G major, K. 11 (while in London, England)
1765
February 21 – Symphony No. 1 in E♭ major, K. 16 by Wolfgang Amadeus Mozart (1756-1791) was first performed in London, England
1766
January 22 – Symphony No. 5 in B♭ major, K. 22 by Wolfgang Amadeus Mozart (1756-1791) was first performed in The Hague, the Netherlands
March 11 – Gallimathias musicum, K. 32 by Wolfgang Amadeus Mozart (1756-1791) was first performed in The Hague, the Netherlands
1767
December 30 – Symphony No. 6 in F major, K. 43 by Wolfgang Amadeus Mozart (1756-1791) was first performed in Brno, Czech Republic
1768
Wolfgang Amadeus Mozart (1756-1791) completed the one-act singspiel, the comic opera Bastien and Bastienne, K. 50
1769
August 8 – Cassation in B♭ major, K. 99 by Wolfgang Amadeus Mozart (1756-1791) was first performed in Salzburg, Austria