Miami operates on the America/New_York timezone, switching between EST (Eastern Standard Time, UTC −5:00) in winter and EDT (Eastern Daylight Time, UTC −4:00) from mid-March to early November. Miami shares this timezone with New York, Washington, and the entire US East Coast — though Miami's physical location (southernmost tip of the continental US, near the Tropic of Cancer) means it experiences significantly different sunrise and sunset times than northeastern cities sharing the same clock.
As the gateway to Latin America, Miami's business community is uniquely oriented toward South and Central America. São Paulo (Brazil) is typically in UTC −3:00, making it 2 hours ahead of EST — a comfortable overlap. Buenos Aires (UTC −3:00) is also typically 2 hours ahead. Bogotá, Lima, and Quito (UTC −5:00) share EST for part of the year. This Latin American orientation makes Miami's Eastern Time the de facto business timezone for US–Latin America commerce.
Miami is also a major cruise industry hub — Port Miami is the world's busiest cruise port — and a key point for international banking with strong ties to Caribbean and Latin American clients. PortMiami's shipping and logistics operations run across multiple time zones, making precise time coordination essential for vessel scheduling.
Florida has voted to adopt permanent EDT (UTC −4:00) through the Sunshine Protection Act, passed by the state legislature in 2018. However, like California's Proposition 7, federal approval is still pending — so Miami continues to observe standard biannual clock changes for now.