How many time zones are supported?
Over 400 cities and regions across all IANA time zones are included. All conversions use
the Intl.DateTimeFormat browser API, which automatically handles daylight saving time (DST) changes for each
location.
Does it handle Daylight Saving Time automatically?
Yes. The tool uses your browser's built-in timezone engine (IANA database), which
automatically applies DST rules for every supported city. No manual adjustment needed.
What do the Meeting Planner colors mean?
Green = business hours (8am–6pm), good for meetings. Orange = early morning or evening
(6–8am or 6–10pm), acceptable if necessary. Red = night hours (10pm–6am), avoid scheduling meetings.
Can I save my city list?
Yes. Your world clock cities are automatically saved to browser localStorage and restored
when you return to the page.
How do I convert EST to PST or UTC?
Use the Time Converter section. Select EST (New York) in the From field, then PST (Los
Angeles) or UTC in the To field. Enter your time and click Convert for an instant result. The tool handles
DST automatically.
Can I convert GMT or UTC to my local time?
Yes. Select UTC or GMT in the From field, then search for your city in the To field. The
tool calculates the exact local time including any UTC offset or Daylight Saving Time adjustment.
How do I schedule a meeting across multiple time zones?
Use the Meeting Time Planner at the bottom of the page. Add all the cities where your team
members are located, then adjust the meeting time. Each city is color-coded: green (business hours), orange
(early/late), red (nighttime) — making it easy to find a slot that works for everyone.
Is this time zone converter free and private?
Yes, completely free with no sign-up required. All calculations run locally in your browser
— no data is sent to any server, and your location or scheduling details remain completely private.
What is the difference between UTC and GMT?
UTC (Coordinated Universal Time) is the global time standard used worldwide. GMT (Greenwich Mean Time) is a
time zone. In everyday use they are often treated as equivalent.
Which cities use UTC time?
UTC is commonly used by airlines, international businesses, software systems, and scientific organizations.
Many countries also reference UTC when calculating local time.
Can I use this tool to schedule international business meetings?
Yes. The built-in Meeting Planner helps teams across multiple countries find suitable meeting times while
avoiding late-night or early-morning hours.
Does the world clock update in real time?
Yes. All clocks update automatically every second using your browser's timezone engine for accurate
real-time results.
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