Which countries don't observe daylight saving time?

Daylight saving feels like a global ritual if you grew up in the United States, the UK or Europe. From a worldwide view it is the exception, not the rule. Far more people live somewhere that never touches the clock than somewhere that springs forward each spring.

So which countries skip it entirely?

The non-observers cover a huge share of the planet's population. Most of Asia keeps a single year-round clock, including India, China, Japan and Singapore. The Gulf states and most of the Middle East do the same, as does most of Africa. Two of the largest economies in the Americas have joined them recently: Brazil abolished daylight saving in 2019, and most of Mexico abolished it in 2022.

What about the United States and Canada?

Most of North America does change its clocks, but there are notable holdouts. In the US, Hawaii and most of Arizona stay on standard time all year. In Canada, Saskatchewan keeps a single clock. These pockets are why a meeting time you set in March can quietly drift relative to Phoenix or Honolulu while everyone around them shifts.

Why is Australia split?

Australia is the clearest example of a country divided on the question. The southern states, including New South Wales, Victoria, South Australia, Tasmania and the ACT, observe daylight saving in summer. But Queensland, Western Australia and the Northern Territory do not. For part of the year the country runs on several different offsets at once, which is a frequent source of scheduling errors for anyone working across Australian cities.

Who does observe daylight saving?

The clock-changers are concentrated in North America, Europe, and parts of the southern hemisphere, notably southern Australia, New Zealand and Chile. Because the northern and southern hemispheres have opposite seasons, they also shift in opposite directions and at different times of year, which briefly scrambles the usual gap between, say, London and Santiago.

Why do so many places skip it?

Geography explains most of it. Countries near the equator gain almost nothing from daylight saving, because day length barely changes through the year, so there is no early evening light to "save". Elsewhere the reasons are practical: the twice-yearly switch is disruptive, the energy savings are disputed, and a single year-round clock is simply easier to live with. That is what drove Brazil and most of Mexico to end the practice.

What it means for scheduling

The takeaway is the same as with fractional offsets: do not assume the gap to another city holds steady. A time that works in summer can be an hour off in winter once one side changes and the other doesn't. The safest habit is to read each person's actual local time on the day of the meeting rather than trusting last month's arithmetic, which is exactly what Atlas does for you, daylight saving rules built in.