Time Differences
The Indonesian archipelago is divided into three time zones . Sumatra, Java, Kalimantan Barat and Kalimantan Tengah are on Western Indonesian time (7hr ahead of GMT, 15hr ahead of US Pacific Standard, 12hr ahead of US Eastern Standard, and 3hr behind Sydney); Bali, Lombok, the Nusa Tenggara islands, Sulawesi and South and East Kalimantan are on Central Indonesian Time (8hr ahead of GMT, 16hr ahead of US Pacific Standard, 13hr ahead of US Eastern Standard, and 2hr behind Sydney); and Irian Jaya is on Eastern Indonesian Time (9hr ahead of GMT, 17hr ahead of US Pacific Standard, 14hr ahead of US Eastern Standard, and 1hr behind Sydney).