Current Dates and Times across USA. Across the United States of America, Daylight Savings Time is now in effect. Daylight Saving Time is not observed in Hawaii, and by most of Arizona. In summer, local time in Arizona is the same as Pacific Daylight Time (PDT). In the winter Arizona is on Mountain Standard Time (MST). Alaska (AK) 90% of Alaska is (1 hour) behind the Pacific Time Zone, while the far reaches of the Aleutian Islands use Hawaii-Aleutian time.