Timezone Helper

What Timezone Helper does

Timezone Helper shows the current time in cities around the world on one timeline, so you can see at a glance who is at work, who is asleep, and when a meeting suits everyone. Each row is a city; the shaded band behind it marks night, daytime and working hours in that city’s local time, and the red line is now. It runs in the browser, needs no account, and remembers your cities on this device.

How to use it

• Hover anywhere on the timeline, or use the arrow keys, to see the time in every city at that moment. The date under each time shows which cities are already on another day.
• Click to pin a time, then use Copy link to share it. The link opens the same cities, date and time for anyone.
• Add a city with the search box: every place with 150,000 people or more, about 4,400 cities, searchable by name, state or country, with their IANA time zones.
• Drag the grip at the left of a row to reorder cities, or press Sort by time to put them back in order of UTC offset.
• Pick any date to see the offsets on that day. Daylight-saving changes are applied automatically, so a city that changes its clocks shows a 23 or 25 hour day.
• Switch between 12-hour and 24-hour clocks.
• Scroll sideways to move through the days; two days are always on screen.

Cities on this timeline

• Sydney, New South Wales, Australia (Australia/Sydney)
• Singapore, Singapore (Asia/Singapore)
• Kuala Lumpur, Malaysia (Asia/Kuala_Lumpur)
• Delhi, India (Asia/Kolkata)
• Dubai, United Arab Emirates (Asia/Dubai)
• London, England, United Kingdom (Europe/London)
• New York City, New York, United States (America/New_York)
• Toronto, Ontario, Canada (America/Toronto)
• Chicago, Illinois, United States (America/Chicago)
• Houston, Texas, United States (America/Chicago)
• Los Angeles, California, United States (America/Los_Angeles)
• Vancouver, British Columbia, Canada (America/Vancouver)
• Tokyo, Japan (Asia/Tokyo)
• Shanghai, China (Asia/Shanghai)
• Moscow, Russia (Europe/Moscow)
• São Paulo, Brazil (America/Sao_Paulo)

Questions and answers

How do I find the time difference between two cities?

Add both cities and hover over any hour. The column on the left shows the local time in each city at that moment, and the date under each time tells you when one of them is already on the next day.

Does it handle daylight saving time?

Yes. Offsets come from the IANA time zone database for the date you are viewing, so the timeline is right on the days clocks change, not only today.

Which time zone is home?

Your browser’s time zone. Its date anchors the timeline and its rows are highlighted. A shared link carries the sender’s home zone, so the view looks the same for everyone who opens it.

Is it free?

Yes. There is no account and nothing to install. Your cities and settings are kept in your browser only.