During what musical period did composers perfect and standardize the concerto sonata and symphony forms?

The Classical period, which spanned roughly from 1750 to 1820, is when composers perfected and standardized the concerto, sonata, and symphony forms. This era saw significant developments in musical structure and clarity, with prominent composers like Haydn, Mozart, and Beethoven establishing the conventions that would define these genres. Their works emphasized balance, form, and thematic development, leading to a more refined and systematic approach to orchestral and instrumental music.