In music theory, B-flat major is a major scale based on B♭, with pitches B♭, C, D, E♭, F, G, and A. Its key signature has two flats. Its relative minor is G minor and its parallel minor is B-flat minor.
Many transposing instruments are pitched in B-flat major, including the clarinet, trumpet, tenor saxophone, and soprano saxophone. As a result, B-flat major is a popular key for concert band compositions.
In most Central and Northern European languages (German, Hungarian, Nordic, Baltic, Western and Southern Slavic languages, except Bulgarian), the pitch B is usually called "H" while B♭ is called "B".