Western Indonesia
Western Indonesia is one of the two main geographical regions of Indonesia, the other being Eastern Indonesia. It consists of 21 provinces in Sumatra, Java, and Kalimantan. Western Indonesia Time (Waktu Indonesia Barat, WIB) is seven hours ahead (UTC+07:00) of the Coordinated Universal Time (UTC), used in the islands of Sumatra, Java, and the western half of Kalimantan.
Western Indonesia has a land border with East Malaysia to the North and Peninsular Malaysia to the West.