Organize international appointments with precision: check the exact time in different regions of the world.
Tuesday, August 12, 2025
12:34:56
AM
São Paulo,
BR
• America/Sao_Paulo
• GMT-03DST
0 results
No results found.
🌍 Select Language
The online world clock shows the local time in any city using the IANA time zone database (e.g., America/Sao_Paulo, Europe/London). You can see the offset from GMT/UTC, a Daylight Saving Time (DST) indicator when active, and toggle between 12h/24h formats. Everything works directly in your browser, no sign-up required, with preferences saved locally.
How to Use the World Clock (Step-by-Step)
Search for a city: type the name in EN/PT (accepts variations without accents, e.g., “Sao Paulo”, “Mexico City”).
Filter by continent: use the chips (All, Africa, Americas, Asia, Europe, Oceania) to focus your search.
Set the highlight (hero): click a card to pin the main clock at the top with that time zone.
Share the view: the URL includes ?tz= and ?city= parameters; copy and send the link.
Change 12h/24h format: use the control in the header; the preference is remembered for future visits.
Application Features (Highlights)
Real-time updates: the main clock updates every second; cards update on the minute change.
Reliable IANA database: reflects official time zone rules and regional changes.
DST indication: a “DST” badge appears when Daylight Saving Time is active for the city.
Clear offset: displays GMT±hh:mm for easy comparisons and global scheduling.
Search with aliases: accepts alternative names (e.g., Pequim/Beijing, Quioto/Kyoto).
Privacy by default: filters and preferences are stored only on your device (localStorage).
Responsive interface: lightweight layout adapted for desktop and mobile.
Practical Tips
International meetings: compare offsets and check the DST badge during seasonal transitions.
Travel: add your origin and destination; the offset helps estimate jet lag and connections.
Alternative names: try EN, PT, and versions without accents if you can't find a city at first.
Browser favorites: save the link with ?tz=, ?city=, and filters to reopen the same context.
Frequently Asked Questions (FAQ)
What is the IANA database? It's the international standard for time zones (e.g., America/New_York) with official time and DST rules.
Why does the time change at certain times of the year? Because of Daylight Saving Time (DST); the site indicates when it's active.
Why do cities in the same country differ? Large countries have multiple time zones and distinct DST policies; check the GMT±hh:mm.
Do I need to keep the tab open? Yes. Continuous updates require the tab to be open (it can be in the background).
Is the time always accurate? We use your browser's Intl API and the IANA database; if your system is outdated, rare discrepancies may occur.
How do I share a view? Copy the URL with ?tz= and ?city= after selecting a city.
Can I toggle 12h/24h? Yes. The control in the header changes the format, and the preference is remembered.
Note: educational content; does not replace medical, psychological, or professional advice. Adapt practices to your context and health.