TetraKitsWorld Clock
Plan international calls without guessing time zones. See live clocks for major cities worldwide, add or remove any IANA timezone from the dropdown, and view UTC offset and local date — updated every second.
Read: World Clock Guide: Live Time Across Time Zones →
- Free to Use
- No Signup
- Privacy Friendly
How to use the world clock
- 1
View default cities
Your local time, UTC, New York, London, Tokyo, and Sydney appear by default with live second-by-second updates.
- 2
Add a city
Click + Add city to open the searchable picker — browse popular cities or search any IANA time zone worldwide.
- 3
Plan across zones
Compare offsets before scheduling. For duration math within a day, use the time calculator.
Understanding time zones
Each city uses an IANA timezone (e.g. America/New_York) that accounts for daylight saving rules automatically. UTC (Coordinated Universal Time) is the global reference — offsets like UTC+5:30 (India) or UTC−5 (US Eastern) show how far ahead or behind each zone is.
- Your local time — detected from your browser
- UTC offset — changes with daylight saving in many regions
- Date line — cities can be on different calendar days
Why Use This Tool?
Many Cities
Add any major timezone from a searchable dropdown.
Live Updates
Clocks refresh every second for accurate time.
Meeting Planner
Compare zones before scheduling international calls.
No Tracking
Timezone data uses your browser — no server location requests.
Frequently Asked Questions
How accurate is the world clock?
It uses the Intl API with IANA timezone data built into your browser — the same source as your operating system clock.
Does it handle daylight saving time?
Yes. DST rules are included in IANA timezone data and update automatically when regions change clocks.
Can I add any city?
You can add any timezone from the dropdown. Each entry uses standard IANA names like America/New_York or Asia/Kolkata.
Why use one world clock instead of many pages?
Competitors publish separate pages per timezone for SEO. TetraKits gives you one tool where you add only the cities you need — faster and less clutter.
Is the world clock free?
Yes. Unlimited cities, no signup, and no location tracking.
One Clock for Every Time Zone You Care About
Scheduling a call between San Francisco, London, and Singapore means juggling three offsets and possible date changes. Add those cities once, see live time and UTC offset side by side, and skip the maze of single-city landing pages competitors use for search traffic.
