Chamorro Standard Time (Guam)

Chamorro Standard Time (ChST) is UTC+10 year-round, covering the US territories of Guam and the Northern Mariana Islands. Guam does not observe daylight saving time. Hagatna is the capital, though Dededo is the most populous village. Guam is a critical US military installation in the Western Pacific, home to Andersen Air Force Base and Naval Base Guam, making ChST strategically important for US military operations in the Asia-Pacific region. The island's position, often called 'Where America's Day Begins,' means it is the first US territory to see sunrise each day (ahead of Hawaii). Guam's timezone is the same as Papua New Guinea and the Australian Eastern Standard Time (when Australia is not on DST). The island's economy is driven by the US military, tourism (primarily from Japan and South Korea), and federal spending. Guam's culture reflects its indigenous Chamorro heritage blended with Spanish colonial and American influences. The island has become increasingly important in US strategic planning as a forward base in the Pacific. Guam's position at UTC+10 puts it 15 hours ahead of US Eastern Time, creating a significant time gap with the mainland.