It is an experience this festival in Bali. It is the biggest and the most moving one. I found a cheap flight from Amsterdam covering the two weeks of the event. It is with a good company, from my own experience,China Southern, but it has a minus, the transit time in Guangzhou. It is not a city to worth the visit by itself but if in a transit is ok for few hours.
The Balinese celebrate the day of Galungan, which commemorates the triumph of Dharma over Adharma, or good against evil, this May 29 to 31. Second in significance after the Nyepi or Saka New Year, this observance comes twice a Gregorian year, as the Balinese use a 210-day calendar system known as the Pawukon that is the basis for their daily rituals, temple anniversaries and holidays. Galungan is celebrated again December 25-27.