Time and dates for everyone, wherever they are.
Time Dates is a free set of clocks, calendars and calculators that starts from where you are. Open it in Mumbai, Manchester or Minneapolis and it shows your own time, your own public holidays and your own sunrise, with the rest of the world one tap away.
Tools that answer everyday time questions.
Every tool works for any country and follows your own location, so the first answer you see is the one you need.
- Calendar and holidaysA monthly calendar with the public holidays of your country, picked from your time zone.
- Date calculatorDays, weeks and working days between two dates, or a date plus or minus any amount of time.
- Time zone converterYour time in any city, with the next daylight saving change for each one.
- Sun and moonSunrise, sunset, day length and tonight's moon phase for where you are.
- World clockYour local time to the second, with the progress of the day and the week number.
- Time in the United StatesLive time in every state and the largest cities, with federal holidays and clock changes.
Built on sources you can check.
We use open, well-maintained data and published formulas, so every time and date on the site can be traced back to its source.
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01
Time zones and daylight saving
Every UTC offset and clock change rule comes from the time zone database kept by the Internet Assigned Numbers Authority, the same data used by phones and computers.
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Places
City and state names, coordinates and time zones come from GeoNames, an open geographical database, under the Creative Commons Attribution 4.0 licence.
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Public holidays
Holiday dates for 245 countries and territories come from the open-source holidays library, which is maintained by volunteers around the world.
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Sunrise and sunset
Sun times are calculated with the solar position formulas behind the solar calculator of the National Oceanic and Atmospheric Administration.
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Moon phases
New moon, full moon and quarter times use the algorithms in Astronomical Algorithms by Jean Meeus, a standard reference in astronomy.
Three promises behind every page.
These decide what we build and what we leave out.
Free, with no sign-up
Every tool works without an account, a subscription or an app to install.
Private by design
Your time zone, country and location are worked out in your browser, and we never sell data. Read the privacy policy to see what we collect.
Fast on any phone
Pages are small, load quickly on slow connections and work the same on a phone, tablet or computer.
Questions about Time Dates.
What Time Dates is, where its data comes from and how it works.
01
What is Time Dates?
Time Dates is a free website with world clocks, calendars, public holidays, date calculators, a time zone converter and sunrise, sunset and moon times. It shows everything for your own location first.
02
Who is Time Dates for?
Anyone who works with dates and times: people planning trips or meetings across time zones, teams counting working days, students checking holidays and anyone who wants to know when the sun sets tonight.
03
Is Time Dates free to use?
Yes. Every tool is free, needs no account and works in any modern browser on a phone, tablet or computer.
04
How does Time Dates know where I am?
Your browser tells the page its time zone, and the page uses it to pick your city and country. Nothing is sent to our servers for this. If you press Use my location, your browser asks for permission and the exact position is only used on your device.
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Where does the time zone data come from?
From the time zone database kept by the Internet Assigned Numbers Authority, which records every UTC offset and daylight saving rule in the world and is used by all major operating systems.
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Where do the public holiday dates come from?
Holiday dates come from the open-source holidays library, which covers national public holidays for 245 countries and territories. We publish them for 2025 to 2028.
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How accurate are sunrise and sunset times?
They are calculated with the solar position formulas used by the National Oceanic and Atmospheric Administration and are usually within one minute for your city. Hills, buildings and weather can change what you actually see.
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Which countries have their own pages?
The United States is the first country with its own pages for every state. More countries will follow, and every tool on the home page already works for all countries.
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How often is the information updated?
Clocks update live in your browser. We refresh time zone rules, holiday dates and place data when their sources publish changes.
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How can I suggest a feature or report a mistake?
Write to info@timedates.org or use the contact page. Tell us the page, what you expected to see and your city, and we will look into it.