On Monday on the US mainland (Pacific Time) lands in the early morning hours on Tuesday in Guam, while late Pacific evenings are more usable for Guam morning. None of them observe mainland Daylight Saving Time, so local clocks stay the same year-round—while the gap versus New York or Los Angeles still changes when the mainland springs forward or falls back. County-level detail is beyond this page’s static mainland map—use a city clock or converter when the meeting is near a Time Zone line. Northwest Indiana cities such as Gary and Hammond follow Central so they stay aligned with the Chicago metro; South Bend, still in Indiana but on Eastern, is one hour ahead of Chicago.
Arizona is the mainland exception. 7Reels Casino Those locations do not appear on a four-zone mainland map. Hawaii (UTC−10, no DST) sits outside the four-mainland Time Zones. Most of Alaska uses Alaska Time (UTC−9 / −8 with DST); the far western Aleutians (including Adak) use Hawaii–Aleutian Time (UTC−10 / −9 with DST). During the summer CDT – Central Daylight Time (UTC-5) is in use. Some locations are observed CST while the others are on daylight savings time/summer time.
In December 2009, the Mexican Congress allowed ten border cities, eight of which are in states that observe Central Time, to adopt the US daylight time schedule effective in 2010. At the time, Mexico decided not to go along with this change and observed their horario de verano (“summer schedule”) from the first Sunday in April to the last Sunday in October. In the United States, all time zones that observe DST were effectively changed by the Energy Policy Act of 2005. Although legally located within the Central Time Zone, Kenton, Oklahoma—located to the adjacent east of the defined border of the Central and Mountain time zones (at the Oklahoma−New Mexico state line)—unofficially observes Mountain Time.