What is C major and C minor?
Regarding this, what is the difference between C major and C minor?
C major (or the key of C) is a major scale based on C, with the pitches C, D, E, F, G, A, and B. C major is one of the most common key signatures used in western music. Its key signature has no flats and no sharps. Its relative minor is A minor and its parallel minor is C minor.
Beside this, why is a minor relative to C major?
Relative keys are the most closely related, as they share exactly the same notes. The minor key starts three semitones below its relative major; for example, A minor is three semitones below its relative, C major.
Short answer: C major's role as the key with no accidentals is the result of historical practices that were established and developed in medieval vocal music, before the invention and standardization of the modern keyboard layout and also before the adoption of fixed major and minor scales and keys.