The traditional dance style of Iran can be tribal and regional, or it can be traced to urban court dance, which is a fluid yet rhythmic dance that emphasizes the use of hands and wrists. Persian dance and music are important parts of celebrations such as: Yalda (the winter solstice), Mehregan (the autumn equinox), Norooz (The spring equinox and Persian New Year), or simply at birthdays and weddings. These events are multi generational, giving rise to the opportunity for traditional dances to be passed on from one generation to the next.