Coordinated Universal Time (UTC) is the modern, atomic-clock-based standard that has replaced it for precise timekeeping — but the two are close enough that they’re used interchangeably in everyday contexts, including throughout this page. In North America, Central Time observes standard time at six hours behind UTC (UTC-6), shifting to five hours behind (UTC-5) during daylight saving time. In Mexico, the northern border cities (e.g., Matamoros, Ojinaga) observe DST in sync with the US, while the rest of central Mexico stays on CST year-round. Key IANA time zones include America/Chicago, America/Mexico_City, America/Regina, America/Guatemala, and America/Managua. CST covers a vast area including parts of the United States, Canada, Mexico, and all of Belize, Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua. The US is seeing traction in the opposite direction, with the Sunshine Protection Act that proposes legislation that would make daylight saving time permanent.
No, as of 2023 most of Mexico, including Mexico City, does not observe daylight saving time and stays on CST year-round. Other notable cities include Brandon (Manitoba), Kenora and Dryden (Ontario), and Rankin Inlet (Nunavut). Thus, Canada/Central aligns with US Central Time during both standard and DST periods, but differs from non-DST zones in Central America during summer. 7Reels Casino The DST period lasts about 34 weeks (March to November), giving long summer evenings.
The gap flips only when you compare an Indiana Eastern city with a place that does not change clocks—Arizona is the common mainland case—or when software maps a ZIP code to the wrong county zone. Most counties—including Indianapolis, Fort Wayne, Bloomington, and South Bend—use Eastern Time (America/Indiana/Indianapolis and related IANA zones) and observe the same March / November DST change as New York. Exceptions such as Arizona, Hawaii, and several territories are covered below. In everyday use, the United States has four primary zones—Eastern, Central, Mountain, and Pacific—plus Alaska and Hawaii, and separate zones for populated oversea territories.