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World Clock

See the live local time and day/night in cities around the world, side by side. Add or remove any city.

Related tools

All Dates & time tools →
Twitter/X Timestamp ConverterConvert a tweet URL or Snowflake ID to its exact posting time — and turn any date back into a Snowflake ID.Unix Time ConverterConvert a Unix timestamp (seconds or milliseconds) to a readable date and back, with the live current timestamp.Unix Timestamp ConverterConvert a Unix timestamp into a readable UTC date and time.Anniversary CalculatorHow long has it been, exactly? Years, months and days elapsed since a wedding, a first date, a friendship or a first day at work, the total in days, weeks and hours, the countdown to the next anniversary, the milestones coming up (10 000 days, silver, gold) and — for weddings — the traditional and modern gift for that year, in both the British and the American lists.Autumnal Equinox CalculatorGet the exact instant of the autumnal equinox and of all four seasonal markers for any year, in UTC and in your own offset, with northern and southern naming and the length of each astronomical season.Birth Day of the Week CalculatorFind the weekday you were born on, the weekday of your next birthdays, which weekdays repeat most, and the Doomsday rule behind it.Daily Time Savings CalculatorSee how a few minutes saved each day compound into hours, work days and weeks over a year.Date CalculatorAdd or subtract years, months, weeks and days from any date, with a business-day mode and explicit month-end clamping.

Open World Clock and you get an answer straight away, with no account to create. You will find it under Dates & time, with Twitter/X Timestamp Converter and Unix Time Converter for the neighbouring cases.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does World Clock do?

See the live local time and day/night in cities around the world, side by side. Add or remove any city.

When would I actually use this?

Answering a scheduling question exactly: how many working days until a deadline, what date falls sixty days out, and what time that is for a colleague elsewhere.

What is the most common mistake?

Counting days by subtracting dates and forgetting whether the endpoints are included. Inclusive and exclusive counts differ by one, which is the difference between meeting a deadline and missing it.

How is World Clock different from Twitter/X Timestamp Converter?

They sit next to each other but answer different questions: Twitter/X Timestamp Converter is the one to open when you need it to convert a tweet URL or Snowflake ID to its exact posting time — and turn any date back into a Snowflake ID. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Unix Time Converter is the closest one after this: Convert a Unix timestamp (seconds or milliseconds) to a readable date and back, with the live current timestamp.

Where do the figures come from?

Calendar arithmetic follows the proleptic Gregorian calendar and the IANA time-zone database, so daylight-saving transitions and leap years are handled. Public holidays vary by country and region and are not assumed.

Further reading

All guides →
ExplainerUnix Timestamps, Leap Seconds and the 2038 ProblemUnix time counts seconds since 1970 while deliberately ignoring leap seconds, which is why it is not a count of elapsed physical seconds. Here is what that trade buys, what a leap second does to the counter, the exact instant a signed 32-bit counter overflows, and the factor-of-1000 bug that lands you in 1970 or the year 58589.ExplainerWorking Out an AnniversaryCounting back and counting forward are two different sums, and they disagree by a year on the day itself. What this calculator does with 29 February, what other date libraries do, and where the traditional and modern gift lists actually come from.ExplainerWhat Is a Unix Timestamp?A Unix timestamp counts the seconds since January 1, 1970 UTC. Learn why computers use it, how to convert it, and the 2038 problem.ExplainerDate Arithmetic Is Harder Than It Looks"One month later" has no single correct answer, and every date library has had to pick one. Month addition is neither associative nor invertible, a day is not always 24 hours, and age is not days divided by 365.25.ExplainerLeap Years: The Rule, the Exception, and the Exception to the ExceptionDivisible by four, except centuries, except centuries divisible by four hundred. The three-line rule exists because the tropical year is not 365.25 days, and the arithmetic behind it explains ten deleted days in 1582 and a calendar that repeats exactly every 400 years.GuideThe Pomodoro Method: How Long to Work and How Long to RestTwenty-five and five come from Francesco Cirillo's method, not from a trial. What the research actually measured is task switching and the cost of getting back in — and the reason a fixed interval helps is not that 25 minutes is optimal. Plus what the planner really returns, including the long break it quietly leaves out.