Эсчевский, KSA, 4atty Aka Tilla made "Happy Birthday" available on April 7, 2013. Happy Birthday is explicit and may not be suitable for children. With the duration being about 3:54, this song is close to the average duration of a typical track. There is only one song in Начало II, so we believe that "Happy Birthday" is a single. Happy Birthday is not that popular right now. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

Happy Birthday テンポ

The tempo marking of Happy Birthday by Эсчевский, KSA, 4atty Aka Tilla is Adagio (slowly with great expression), since this song has a tempo of 72 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 3/4.

Happy Birthday キー

G Major is the music key of this track. This also means that this song has a camelot key of 9B. So, the perfect camelot match for 9B would be either 9B or 10A. While, 10B can give you a low energy boost. For moderate energy boost, you would use 6B and a high energy boost can either be 11B or 4B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 9A or 8B will give you a low energy drop, 12B would be a moderate one, and 7B or 2B would be a high energy drop. Lastly, 6A allows you to change the mood.