'/%3e%3cpath%20d='m27%2024%205-5a9.2%209.2%200%200%201%2013%2013l-5%205M37%2040l-5%205a9.2%209.2%200%200%201-13-13l5-5M26%2038l12-12'%20stroke='%23fff'%20stroke-width='5.4'%20stroke-linecap='round'%20stroke-linejoin='round'/%3e%3c/svg%3e){kind=small}
Account and market clocks
See dates, time including seconds, UTC offsets and day differences. Swap account and market or copy the current comparison.
Ad account time zones
Compare account and local advertising time.
Using this tool
Enter the text, link or values to process, choose the available options, and check the result before copying or downloading it.
Your tool inputs and processing results are not published as part of this page. Review the tool instructions before entering sensitive information.
Match market time to your ad account clock
Choose the account and market timezones to compare dates, times and UTC offsets for the same instant. Use the linked timeline to plan campaign windows, launches and team coordination. The tool converts time without reading ad accounts or submitting schedules.
Features
Check live differences and planned dates in one workspace.
Multi-city timeline
Compare account, market and up to 8 additional timezones, at most 10 in total. Move any slider or select a cell to update every city to the same instant.
Plan a specific date
Enter a date and time to the minute in the account timezone. Move by 15 minutes, hold a planned instant in manual mode, or return to now for live updates.
DST and day-boundary handling
Regional offsets follow the selected date. Repeated local times require an explicit UTC offset; nonexistent local times are rejected.
Custom reference periods
Set active and quiet reference periods in 15-minute increments, including overnight ranges. Equal start and end times disable a marker.
Daily table and local preferences
The daily table lists market times for account hours and offset transitions, with text copying. Timezones and reference periods are saved automatically in this browser.
How to use
Start with the timezone actually configured in your ad account.
Choose account and market timezones
Confirm the account timezone in the platform, then search for a market city or IANA identifier. The browser default is not an imported account setting.
Set the comparison date
View the current instant directly, or enter an account-local date and time and apply it for planning. Check any DST offset prompt.
Add comparison cities
Add team or other market timezones to the timeline. Duplicate zones are not added; remove additional zones when no longer needed.
Compare and set reference periods
Move a slider to compare local dates and times, then set reference periods for your workflow. Table colors use market time; each timeline uses its city’s local time.
Copy and verify in the platform
Copy the current comparison or daily table, keeping dates and UTC offsets for verification in the ad platform. Return to now after manual planning.
Conversion rules and saved settings
Check the timezone name, date and offset together instead of assuming one permanent hour difference.
- Regional zones and fixed offsets
- Regional zones such as America/New_York use the browser’s Intl timezone data and the selected date. Fixed offsets such as UTC−05:00 do not observe DST. Results depend on updated system and browser timezone data.
- Date range and resolution
- Supported dates: 2000-01-01 to 2100-12-31. Timeline cells and quick adjustments use 15 minutes; manual input accepts minutes. This does not define the scheduling resolution allowed by an ad platform.
- What is saved automatically
- Account, market and extra timezones and reference periods stay in this browser without sign-in or cross-device sync. Planned dates, the selected instant and copied content are not persisted.
- Local calculation and storage limits
- Conversion runs in the browser without uploading selected zones or simulated times. If storage is blocked, conversion still works, but settings may need to be selected again next time.
Use cases
Use this to check time boundaries alongside original reports and platform settings.
Overseas ad scheduling
Map market business hours to account time, check date changes and enter a schedule supported by the ad platform.
Align order and ad report times
Compare store and ad-platform day boundaries or specific instants to choose report date ranges. The tool does not merge data or recalculate attribution.
Launches and support shifts
Confirm dates and times across markets for launches, page updates or support shifts rather than sharing a time without its timezone.
International team coordination
Add team locations, move the timeline to find overlapping working hours and copy the comparison for a meeting or handover.
FAQ
Most differences come from dates, regional zones and fixed offsets.
How is the default market timezone chosen?
Valid saved settings in this browser take priority. On first use or with an invalid market zone, the browser’s regional timezone is used, falling back to Asia/Shanghai if unavailable. This is not IP geolocation or a detected target market.
Is daylight saving time handled automatically?
For regional zones the browser applies rules for the selected date, so the difference may vary by date. Keep the browser and system updated. Fixed UTC offsets do not switch for DST.
Why can New York differ from UTC−05:00?
America/New_York is a regional zone with date-dependent rules; UTC−05:00 is constant. Match the region if that is what the platform uses, or choose its explicit fixed offset. Do not rely on abbreviations such as EST or PST alone.
Why can a day differ from 24 hours or a time be unavailable?
DST or rule changes can skip or repeat local times, producing 23-, 24- or 25-hour days or half-hour changes. Missing times are rejected; repeated times require choosing a UTC offset to distinguish the two instants.
Do the colors indicate the best advertising times?
No. Default active hours are 18:00–22:00 and quiet hours 01:00–06:00; both are adjustable. They use no campaign or conversion data. Active takes priority when periods overlap; schedule using actual performance.
How many timezones can I compare?
Keep up to 8 additional zones besides account and market, at most 10 total. Identical account and market zones share one row, but the 8-extra limit remains. Duplicate zones are not added.
Will settings follow me to another device?
No. Preferences stay in this browser and do not sync through an account. Clearing site data, changing browsers or starting a new private session may require setup again. The simulated date and instant are not saved.
Does selecting an account timezone change the ad platform?
No. The tool does not connect to ad accounts. Selection changes only this page’s comparison basis; it does not publish ads, adjust budgets or alter reports. Verify the actual timezone and configure schedules manually under platform rules.
Using this tool
Enter the text, link or values to process, choose the available options, and check the result before copying or downloading it.
Your tool inputs and processing results are not published as part of this page. Review the tool instructions before entering sensitive information.
Read the free tools workflow guide ↗