Free time tools built around your location.
Time Dates gives you world clocks, calendars, public holidays, date calculators, time zone conversion, sunrise, sunset and moon phase tools in one place. The first answer starts with your own location, then lets you check the rest of the world in a few taps.
Time tools for everyday planning.
Each tool works from your browser time zone first, then lets you compare countries, cities, dates and daylight changes without creating an account.
- Calendar and holidaysMonthly calendars with public holidays for your country, picked from your time zone.
- Date calculatorCount days, weeks and working days, or add and subtract time from any date.
- Time zone converterCompare your time with another city and see the next daylight saving change.
- Sun and moonCheck sunrise, sunset, day length and tonight's moon phase for your place.
- World clockSee your local time to the second, with day progress and the week number.
- Time in the United StatesLive time for every US state and large city, with holidays and clock changes.
Data sources are named clearly.
Time zones, places, holidays, sun times and moon phases come from named public sources. The goal is simple: you should know where the answer came from.
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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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02
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.
How each page is built.
These rules decide what stays on the site and what gets left out.
Free, no sign-up
Every clock, calendar and calculator works without an account, subscription or app install.
Location stays in your browser
Your time zone and country are worked out in your browser. Exact location is used only after browser permission. Read the privacy policy to see what is collected.
Fast on phones
Pages stay small, load on slow connections and work on phones, tablets and computers.
Common questions about Time Dates.
Quick answers about the tools, location use, data sources, holidays and updates.
01
What is Time Dates?
Time Dates is a free website for world clocks, calendars, public holidays, date calculators, time zone conversion, sunrise, sunset and moon phases. It starts with your own location first.
02
Who uses Time Dates?
People use it to plan meetings, trips, working days, holidays, daylight hours and clock changes across countries and cities.
03
Is Time Dates free?
Yes. Every clock, calendar, converter and calculator is free, works without sign-up and runs in a modern browser.
04
How does Time Dates pick my location?
The page reads your browser time zone first. If you press Use my location, the browser asks permission and the exact position is used on your device.
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Where does the time zone data come from?
Time zone names, UTC offsets and daylight saving rules come from the IANA time zone database used by phones, computers and browsers.
06
Where do public holiday dates come from?
Public holiday dates come from the open-source holidays library, covering national holidays for 245 countries and territories from 2025 to 2028.
07
How accurate are sunrise and sunset times?
Sunrise and sunset are calculated from NOAA solar formulas and are usually within one minute for a city. Local hills, buildings and weather can change what you see.
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Which country pages are available now?
The United States has pages for every state and many cities. The main tools already work worldwide, and more country pages are being added.
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How often is the information updated?
Clocks update live in your browser. Time zone rules, holiday dates and place data are refreshed when their source data changes.
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How can I report a mistake?
Use the contact page or email info@timedates.org. Send the page, your city and what you expected to see so the issue can be checked.