The world, on time.

Free time and date tools for global teams — world clock, timezone converter, meeting planner, and more.

World ClockConvert Timezones

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Everything you need to manage time globally

DateAndClock is a free collection of time and date tools designed for anyone who works, communicates, or schedules across multiple time zones. Whether you need to know what time it is right now in Tokyo, figure out when to hold a video call with a team spread across New York, London, and Singapore, or calculate how many days remain until an important deadline — all the tools you need are here in one place.

Every tool is completely free with no account required. Preferences are stored locally in your browser. All timezone math uses the IANA timezone database — the same authoritative source used by operating systems and programming languages worldwide — so Daylight Saving Time transitions are always handled correctly.

Free Time & Date Tools

Eight tools, all free, all accurate, no sign-up required.

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World Clock

Track live local time across 20+ major cities simultaneously. Add any city, sort by time or alphabetically, and see a 24-hour progress bar showing where each city is in its day.

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Timezone Converter

Instantly convert any time between two cities or UTC offsets. Automatically accounts for Daylight Saving Time transitions using the IANA timezone database.

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Meeting Planner

Find overlapping business hours for distributed teams across up to 6 cities. Color-coded hour grid makes it immediately clear when all participants are available.

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Countdown Timer

Count down to any future date and time in days, hours, minutes, and seconds. Includes quick presets for popular events: New Year, holidays, product launches.

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Stopwatch

Precision online stopwatch with centisecond accuracy and lap recording. Track split times, identify fastest and slowest laps, and measure any timed activity.

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Date Calculator

Calculate the exact number of days, weeks, and months between two dates. Add or subtract days from a date. Calculate your precise age in years, months, and days.

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Unix Timestamp

Convert Unix epoch timestamps to human-readable dates or any date to a Unix timestamp. Supports both second and millisecond precision. Shows the live current epoch.

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Calendar

Browse any month with a clean, printable calendar view. Navigate by month and year, see day-of-week alignment for any past or future date.

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Why Accurate Time Tools Matter

Remote work demands time zone awareness

As distributed teams become the norm, knowing the local time in multiple cities is a daily necessity — not an occasional curiosity. Missing a time zone conversion can mean a missed meeting, a misread deadline, or a call that disturbs someone's sleep. A reliable world clock and timezone converter eliminates this friction entirely.

Deadlines need precision

Contract terms, visa validity windows, subscription renewals, tax deadlines — all of these require knowing the exact number of days between two dates. The Date Calculator gives you precise day, week, and month counts without requiring calendar arithmetic in your head.

Developers work in Unix time

Every database, every API response, and every log file timestamp ultimately traces back to a Unix epoch number. Being able to instantly decode 1735689600 into a readable date — or convert a human date into a timestamp for a query — is a constant need in software development. The Unix Timestamp Converter handles this in one click.

Scheduling across continents has a solution

There is no single global business hour, but there are always overlapping windows. The Meeting Planner visualizes the entire day across multiple cities simultaneously so you can find the slot that inconveniences the fewest people — or confirm that no good overlap exists and plan asynchronously instead.

Time Zone Guides

In-depth articles on time zones, UTC, DST, and international scheduling.

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Explainer

UTC vs GMT — What's the Difference?

Both show the same time right now, but they are fundamentally different standards.

Read guide →Reference

Daylight Saving Time 2026: Complete Global Guide

Which countries observe DST, when clocks change, and why some regions opt out.

Read guide →How-To

How to Schedule Meetings Across Time Zones

The proven framework remote teams use to find meeting windows that work for everyone.

Read guide →Technical

Unix Time Explained: What Developers Should Know

What epoch time is, why it exists, the Y2038 problem, and practical conversions.

Read guide →

Frequently Asked Questions

What is DateAndClock?▾
DateAndClock is a free suite of online time and date utilities. It provides a live world clock, timezone converter, meeting planner, countdown timer, stopwatch, date calculator, Unix timestamp converter, and monthly calendar — all in one place with no account or installation required.
Do I need to create an account to use these tools?▾
No. All tools on DateAndClock are completely free to use without any account, sign-up, or payment. Any preferences you set (such as pinned cities on the world clock) are stored only in your browser's local storage and never sent to any server.
How does the timezone converter handle Daylight Saving Time?▾
The timezone converter uses the IANA timezone database built into your browser's Intl.DateTimeFormat API. This means DST transitions are handled automatically and correctly for every region — you don't need to manually adjust for clock changes.
What is the difference between UTC and GMT?▾
GMT (Greenwich Mean Time) is a time zone based on the mean solar time at the Royal Observatory in Greenwich, London. UTC (Coordinated Universal Time) is an atomic time standard. They currently show the same time, but UTC is the official international standard used by computers, aviation, and global communications — GMT is a legacy timezone designation.
How do I find the best meeting time for a global team?▾
Use the Meeting Planner tool. Add up to 6 cities and the tool generates a color-coded 24-hour grid showing business hours (9 AM–6 PM) in green and off-hours in darker shades. The tool automatically highlights suggested meeting slots where business hours overlap across all selected cities.
What is a Unix timestamp and how do I convert it?▾
A Unix timestamp is the number of seconds (or milliseconds) elapsed since January 1, 1970 at 00:00:00 UTC — called the Unix epoch. Use the Unix Timestamp Converter tool to paste any timestamp and instantly see the equivalent UTC time, local time, ISO 8601 string, and relative time. You can also convert any date and time back to a timestamp.
How accurate is the world clock?▾
The world clock uses your device's system clock combined with the IANA timezone database to display local time in each city. Accuracy is limited by your device's system clock precision, which is typically accurate to within a second when synchronized with an NTP time server — which most modern devices do automatically.
Does the stopwatch work if I switch browser tabs?▾
Yes. The stopwatch measures elapsed time independently of whether the tab is active. The timer continues running in the background and accurately reflects elapsed time when you return to the tab.