World Clock – Compare Time Zones Around the Globe
"What time is it there right now?" is one of the most common questions for remote teams, international families, and travelers. The World Clock answers it at a glance by putting a live, ticking clock for every city you care about side by side with your own home time zone, so you can compare local times without doing any mental math.
Add Any City in Seconds
Search for a city by name or country and add it to your board with one click. Every card shows that location's live local time,date, current UTC offset, and exactly how many hours it is ahead of or behind your home time zone. You can track up to 20 cities at once, and your list is saved in your browser so it's ready the next time you open the tool.
Built on the IANA Time Zone Database
Rather than hardcoding fixed offsets, the World Clock reads each city's time directly from the browser's built-in Intl API, which ships with the same IANA time zone database used by operating systems and programming languages worldwide. That means offsets and Daylight Saving Time transitions are always current — no manual updates required, and every clock automatically reflects the correct rules for its region and date.
DST tag, so you can immediately spot which of your added locations has shifted its clocks forward for the season.Preview Any Future Date and Time
Switch on Custom Date & Time mode to stop showing "now" and instead enter a specific date and time in your home time zone. Every city on the board instantly recalculates to show what its local time would be at that exact instant — perfect for scheduling an international call, planning a trip itinerary, or figuring out when a live-streamed event will air where you are.
Day, Night, and Business Hours at a Glance
Each card includes a small sun or moon icon indicating whether it's roughly daytime or nighttime in that city, and a Business hours badge flags whenever the local time falls inside a typical 9 AM–5 PM working window. Combined with the offset and difference-from-home tags, this makes it fast to eyeball which of your added cities are awake and working right now.
Customize the Display
Toggle between a 12-hour and 24-hour clock format, choose whether to show seconds, and sort your city list either alphabetically or by UTC offset so nearby time zones cluster together. A Copy All button exports every clock as plain text for pasting into an email or chat message when you need to share the comparison with someone else.
Common Use Cases
Remote and distributed teams use the World Clock to find a reasonable meeting window across regions, travelers use it to know when to call home, event organizers use it to communicate airtimes across markets, and international families use it simply to know when it's a good time to check in.
Limitations
The day/night icon is a simple 6 AM–6 PM heuristic rather than an actual sunrise/sunset calculation, and business hours assume a standard 9-to-5 window rather than each location's actual working schedule. Time zones not yet reflected in the browser's IANA database, or highly localized offsets that differ from a region's standard city, may not be available in the search list.