The 12 months over the 365 days of the year is derived from the earth's position in relation to the sun. For some cultures, however, a lunar calendar was used for centuries before solar became the universal standard. Even though they are rarely used today, lunar calendar milestones, such as New Year’s Day, are still celebrated in many countries like China, Indonesia, Malaysia, and Taiwan.
The dance that is featured in the video is being performed at a Chinese New Year's celebration. Called The Butterfly Lovers, the performance is actually an artistic interpretation of a famous Chinese legend. The story is described by many to be the Eastern equivalent of Romeo and Juliet.