# 21st Century Breakdown – Green Day: piano chords

21st Century Breakdown by Green Day uses 7 chords in D major; difficulty on the piano: medium.

## Chords in the song

[D](https://pianokitty.com/c/Dmaj), [A](https://pianokitty.com/c/Amaj), [G](https://pianokitty.com/c/Gmaj), [Bm](https://pianokitty.com/c/Bm), [C#](https://pianokitty.com/c/Csharpmaj), [B](https://pianokitty.com/c/Bmaj), [Bb](https://pianokitty.com/c/Asharpmaj)

## Chord sheet

- Intro 1: D A G
- Verse 1: D A G D A G D A G D A G Bm G Bm G A
- Chorus 1: D A G D A G D A G D A G
- Verse 2: D A G D A G D A G D A G Bm G Bm G A
- Chorus 2: D A G D A G D A G D A G A D A D A D A D G A D G A D G A D G A D G A D G A D G A D G A D G A D G A D G A D G D A G D A D C# B A G Bb D C# B A G Bb

## Questions

### Which chords does 21st Century Breakdown by Green Day use?

Different chords: 7. They are all in the list under “Chords in the song”.

### What key is 21st Century Breakdown by Green Day in?

The chords fit D major. This is estimated from the chords, so the recording may be in another key.

### How hard is 21st Century Breakdown to play on the piano?

Difficulty: medium. The rating counts the different chords (7), 7th and extended chords, and chords with another bass note.

[Practice this song](https://pianokitty.com/app?subject=songs&spec=%3Cintro_1%3E+D+A+G+%3Cverse_1%3E+D+A+G+D+A+G+D+A+G+D+A+G+Bm+G+Bm+G+A+%3Cchorus_1%3E+D+A+G+D+A+G+D+A+G+D+A+G+%3Cverse_2%3E+D+A+G+D+A+G+D+A+G+D+A+G+Bm+G+Bm+G+A+%3Cchorus_2%3E+D+A+G+D+A+G+D+A+G+D+A+G+A+D+A+D+A+D+A+D+G+A+D+G+A+D+G+A+D+G+A+D+G+A+D+G+A+D+G+A+D+G+A+D+G+A+D+G+A+D+G+A+D+G+D+A+G+D+A+D+C%23+B+A+G+Bb+D+C%23+B+A+G+Bb&seq=inOrder&title=Green+Day+-+21st+Century+Breakdown)

[Piano chords for popular songs](https://pianokitty.com/songs/browse)

Chord data: [Chordonomicon](https://huggingface.co/datasets/ailsntua/Chordonomicon), [CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/). Chords are transcriptions and can differ from the recording.

https://pianokitty.com/songs/green-day/21st-century-breakdown