A time zone is a region of the world that uses a uniform standard time for legal, commercial, and social purposes. Main US Time Zones: * Eastern (EST/EDT): Covers the east coast of the United States (UTC-5 / UTC-4). * Central (CST/CDT): Covers the middle section of the United States (UTC-6 / UTC-5). * Mountain (MST/MDT): Covers the region near the Rocky Mountains (UTC-7 / UTC-6). * Pacific (PST/PDT): Covers the west coast of the United States (UTC-8 / UTC-7). [1, 2, 3, 4] Universal Time Concepts: * UTC (Coordinated Universal Time): The primary time standard used globally. * GMT (Greenwich Mean Time): The baseline time at zero degrees longitude. * DST (Daylight Saving Time): Moving clocks forward one hour in the spring and back in the autumn. Time zones: Present continuous Wh- Questions: Examples: 1-San Diego: 4 am: What’s Daniel doing? He’s sleeping. 2- Guadalajara: 6 am: What’s Leticia doing? She’s getting up. 3- Washington, DC: 7 am: What are Lya and Erin...