C# major is a major scale based on C#, consisting of the pitches C#, D#, E#, F#, G#, A#, B# (enharmonic to C natural) and C#. Its key signature consists of seven sharps.
Its relative minor is A-sharp minor. Its enharmonic equivalent is D-flat major.
A harp tuned to C-sharp major has all its pedals in the bottom position.