Phần hướng dẫn bên dưới chưa có bằng tiếng Việt nên được hiển thị bằng tiếng Anh. Bản thân máy tính đã được dịch đầy đủ.
Cách sử dụng máy tính này
- Enter the date and time as it reads on the clock in the original location.
- Choose the original time zone and the time zone to convert to.
- See the converted time, both UTC offsets and the time difference.
Công thức
The wall-clock time is first converted to Coordinated Universal Time (UTC) using the source zone's offset on that date, then to the target zone's local time. Offsets change during daylight saving time, so the date matters.
UTC = local time − offset(source)
Target time = UTC + offset(target)
Example
- 9:00 in New York on 8 November (EST, UTC−05:00) = 14:00 UTC.
- London is on GMT (UTC+00:00) in November, so it's 14:00 in London: a 5-hour difference.
- In July both observe summer time and the difference is still 5 hours, but for a few weeks in March and late October/November it is 4.
Câu hỏi thường gặp
Why does the difference change during the year?
Regions start and end daylight saving time on different dates (the US in March and November, Europe in late March and late October), and many places don't use it at all.
What is UTC?
Coordinated Universal Time, the global time standard. Time zones are defined by their offset from UTC, such as UTC+09:00 for Tokyo.
Are half-hour time zones supported?
Yes. India (UTC+05:30), Nepal (UTC+05:45) and Newfoundland (UTC−03:30) are included.