World Clock & Time Zone Converter
Check world clock times, convert between time zones, and plan meetings across cities.
Your local time —
—
—
Beijing
—
—
—
Tokyo
—
—
—
London
—
—
—
New York
—
—
—
Los Angeles
—
—
—
Sydney
—
—
—
Paris
—
—
—
Dubai
—
—
—
Moscow
—
—
—
Mumbai
—
—
—
Singapore
—
—
—
São Paulo
—
—
—
Add timezone
A fair slot in two steps
- 1
Add every participant city so each column shows local waking hours.
- 2
Scan the highlighted overlap band and read your chosen row in each local time.
Offsets, DST and the overlap window
- Fixed offsets are half the story: New York shifts twice a year while Tokyo never moves, so gaps widen and shrink seasonally.
- The overlap view marks hours when every selected city is awake — pick from green rows, not from memory.
- UTC anchors everything: convert once, compare, render locally.
Meeting planning across zones without guesswork
Live world clock
Twelve popular cities plus searchable extras show the current time, date, and UTC offset, with every display refreshed each second from the browser's own timezone data.
DST handled automatically
Timezones are identified by IANA names and resolved through Intl.DateTimeFormat, so daylight saving shifts are applied by the timezone database with no manual adjustment.
Meeting overlap finder
Select your cities and the planner scans each timezone's working hours to return the window when everyone is available at once, for calls that cross continents.
Frequently asked questions
How does the world clock work?⌄
Shows your local time plus live times for popular cities with UTC offset and day/night indicator. Uses browser timezone data, auto-updating.
How is timezone conversion done?⌄
Computes offset between two timezones using browser IANA timezone database. Correctly handles DST — New York↔London is 5h in winter, 4h in summer.
What business hours does the meeting planner use?⌄
Looks for 9:00 AM – 5:00 PM overlap across selected timezones. Shows UTC window if overlap exists, or reports no overlap.
Does the tool handle Daylight Saving Time?⌄
Yes — all calculations use the browser's up-to-date IANA timezone database, which includes DST rules for every region. DST transitions are automatically reflected.
Related tools
What Is a World Clock and Time Zone Converter?
This tool combines three things that people working across borders need: a live world clock showing the current time in a long list of cities, a converter that takes a time you enter in one zone and shows its equivalent in another, and a meeting planner that finds the window when everyone’s working hours overlap. Time zones are identified by their standard IANA names, and offsets are read from the browser’s own time zone database, so daylight-saving changes are reflected automatically. Remote teams, frequent travelers, expats, and families spread across countries are the natural audience. All three modes share a single screen, so one glance replaces a folder full of world-clock bookmarks.
What this tool can do
- 🗺️ A world clock with over thirty cities, each showing flag, local time, date, and current UTC offset.
- 🌗 A day-or-night indicator, so you can tell at a glance which side of the world is awake.
- 🔁 Zone converter: enter a time in the source zone and read the matching time and date in the target zone.
- 🤝 Meeting planner: add several time zones and find the overlap of their 9-to-5 business hours.
- 🔍 Search for cities beyond the popular list, down to the time zone level.
- 💾 Frequently used cities can be saved in the browser so they stay pinned on the clock.
When would you use it
- 💼 Scheduling a stand-up that fits teammates in New York, Berlin, and Singapore.
- ✈️ Checking whether it is a reasonable hour to call home before dialing.
- 🎥 Pinning down a webinar time across zones before the invitation goes out.
- 🌙 Seeing whether a colleague is still in working hours before expecting a reply.
Everything runs locally: your browser supplies the time zone data, and the cities you save stay in the browser’s own storage. Two honest limits: offsets reflect the current season’s daylight-saving rules, and the meeting planner assumes a weekday 9-to-5 rhythm for everyone — real teams with shifted schedules will need to adjust the overlap by hand.