Online Clock
Use a live online clock with digital and analog display, world clocks, timezone comparison, business-hour status, ISO and Unix time, copy, share, CSV export, chimes, fullscreen mode, and wake-lock controls.
Last Updated: July 2026
4:08:48 PM
Thursday, July 16, 2026
Gulf Standard Time (GST) - Dubai · UTC+04:00 · GMT+4
World Clock Board
12:08:48 PM
8:08:48 AM
1:08:48 PM
5:38:48 PM
4:08:48 PM
9:08:48 PM
Clock Details
Local timezone
Local time
ISO time
2026-07-16T12:08:48.275Z
Unix seconds
1784203728
Day / ISO week
197 / 29
Browser Clock Reliability
This online clock uses your device clock and browser timezone data. It is useful for everyday time checks, world-clock comparison, and desk display use, but it is not a certified time source. For official synchronization, compare against Time.gov, NIST, your operating-system time settings, or your organization's approved time source.
Checked by Jitendra Kumar
Online Clock is checked for formula labels, source links, and result limits.
Jitendra Kumar, Founder & Editorial Standards Lead. Updated July 2026. Scope: time calculators.
How to Use This Calculator
Step 1: Choose the primary clock
Select the city or timezone that should drive the large display.
Step 2: Pick a display style
Use digital, analog, or combined mode, then choose 12-hour or 24-hour time and seconds visibility.
Step 3: Build a world clock board
Add the cities you need for meetings, operations, travel, or remote collaboration.
Step 4: Compare a meeting time
Enter a date and time to see the corresponding wall-clock time across saved cities.
Step 5: Copy, share, or export
Copy the current primary time, copy a share link, or export the world-clock board as CSV.
How This Calculator Works
The Online Clock reads the current timestamp from the browser, formats it with the selected timezone using the JavaScript Intl API, and refreshes the display from the timestamp instead of manually adding seconds.
World-clock cards use IANA timezone identifiers, so daylight-saving changes are handled by the browser's timezone data. The board also calculates the UTC offset and a practical business-hour status for each selected city.
Settings and selected cities are saved in local browser storage. The share link encodes selected world-clock zones in the URL, while CSV export is generated directly in the browser.
How to Use an Online Clock for Current Time and World Time
Quick Answer
Use the Online Clock when you need a clear live time display, a world-clock board, or a quick timezone comparison. It is strongest for remote meetings, operations dashboards, classroom projection, travel planning, and technical time checks. For official traceable time, verify against Time.gov, NIST, or your approved system time source.
| Feature | What it does | Best for |
|---|---|---|
| Live clock | Shows the current time with seconds, 12-hour or 24-hour format, date, ISO time, and Unix timestamp. | Desk display, classroom projection, remote work, presentations, time checks, and operations rooms. |
| World clock board | Displays multiple saved cities with timezone offsets, abbreviations, dates, and business-hour status. | Remote teams, travel, trading hours, event support, and international coordination. |
| Time comparison | Enter a date and time once and view the corresponding local time across saved cities. | Meeting planning, deadline handoffs, broadcasts, launches, webinars, and support coverage. |
| Display controls | Switch digital, analog, or combined display; toggle seconds, date, 12/24-hour time, and Unix time. | Large-screen use, quiet desk clocks, teaching time concepts, and technical time checks. |
| Copy, share, export | Copy the current time, share the selected world-clock setup, and export the board as CSV. | Status reports, operational logs, scheduler handoffs, and spreadsheet workflows. |
Clock Terms
| Term | Meaning | How to use it |
|---|---|---|
| Local time | The current time in the browser or selected primary timezone. | Use it for day-to-day clock checks and local scheduling. |
| UTC | Coordinated Universal Time, the reference time used across computing, aviation, and global systems. | Use it when systems, logs, or international teams need a neutral baseline. |
| UTC offset | The difference between a timezone and UTC at a specific date and time. | Use it carefully because offsets can change with daylight saving time. |
| Unix timestamp | Seconds elapsed since 1970-01-01 00:00:00 UTC. | Use it for software logs, APIs, databases, and technical debugging. |
| ISO 8601 time | A standard timestamp format used widely in software and data exchange. | Use it when copying a precise machine-readable time. |
Reliability Checklist
| Factor | What matters | Practical guidance |
|---|---|---|
| Device clock | The browser reads time from the current device clock. | If the device time is wrong, compare with an official time source such as Time.gov. |
| Time zones | Timezone conversion uses browser Intl/IANA timezone data. | Modern browsers handle daylight saving changes, but unusual historical rules can vary by platform. |
| Display updates | The clock refreshes on an interval and recalculates from timestamps. | A throttled background tab may update less frequently until it is visible again. |
| Chimes | Chimes use Web Audio and require browser audio permission through user interaction. | Test the chime before relying on it as an audible cue. |
| Wake lock | Screen wake lock can keep supported displays awake. | It is useful for dashboards, but not every browser or power setting supports it. |
Practical Examples
- Keep a fullscreen local clock open during a classroom or event session.
- Compare New York, London, Dubai, Delhi, and Tokyo before scheduling a call.
- Copy ISO and Unix time during software debugging or log review.
- Export world-clock rows to document support coverage or handoff windows.
Related Workflows
Use the Time Zone Converter for deeper timezone conversion. Use the Online Alarm Clock when a clock-time alert should ring, or the Online Countdown when you need time remaining to a future event.
Keep the research moving with Online Alarm Clock, Online Countdown, Online Timer, and Time Zone Converter.
Frequently Asked Questions
Related Calculators
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Use Online Alarm ClockOnline Countdown
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Use Online CountdownOnline Timer
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Use Online TimerTime Zone Converter
Convert a date and time across global time zones with DST-aware outputs.
Use Time Zone ConverterSources & References
- 1.Time.gov - Official U.S. time(Accessed July 2026)
- 2.NIST Time and Frequency Division(Accessed July 2026)
- 3.IANA Time Zone Database(Accessed July 2026)
- 4.MDN Web Docs - Intl.DateTimeFormat(Accessed July 2026)
- 5.MDN Web Docs - Date(Accessed July 2026)
- 6.MDN Web Docs - Web Audio API(Accessed July 2026)
- 7.MDN Web Docs - Screen Wake Lock API(Accessed July 2026)
- 8.ISO - ISO 8601 date and time format(Accessed July 2026)