What are UTC and GMT?
UTC (Coordinated Universal Time) is the world's reference time. Local times are written as an offset from it, such as UTC+9 for Tokyo or UTC−5 for New York in winter. GMT (Greenwich Mean Time) is the UK's winter time and is effectively the same as UTC for everyday use.
Which places use daylight saving time?
Mainly the United States, Canada, most of Europe, southeastern Australia, New Zealand and Chile. Clocks move forward one hour in summer, so the difference to places without DST changes by an hour. In the southern hemisphere DST runs from about September–October to April. Japan, China, South Korea, India and Singapore have no DST.
Why are some offsets :30 or :45?
Each country chooses its own offset. India (+5:30), Iran (+3:30), Afghanistan (+4:30), Myanmar (+6:30), central Australia (+9:30) and Newfoundland (−3:30) are offset by half an hour, while Nepal (+5:45) and New Zealand's Chatham Islands (+12:45) are offset by 45 minutes.
Where do the times come from?
From this device's clock and the time zone rules built into your browser. Nothing is fetched from the internet, so if your device clock is off, the times will be too. When a country changes its rules, the change arrives with a browser update.
What are skipped and repeated times?
In New York, clocks jump from 2:00 to 3:00 on the day DST starts (Europe changes at 01:00 UTC instead), so 2:30 on March 8, 2026 in New York does not exist; it is converted as 3:30 and marked. On the day DST ends, 1:00–2:00 happens twice, and you can choose the first (DST) or the second (standard time).
How is "Your time" decided?
From your browser's time zone setting (for example America/New_York). No GPS or location data is used. The "Your time" row cannot be removed.