Time Zone Converter & Meeting Planner
Compare multiple cities side by side, drag the slider to find a meeting time, and see which hours overlap work hours (9–5, shaded green) in every city. 100% browser-based.
Add a city to start comparing time zones
🌍 What This Tool Does
A time zone converter and meeting planner that shows multiple cities side by side. Drag the slider to pick any time in your reference city and instantly see the matching local time in every other city you care about — along with a day offset badge (±1 day) when the conversion crosses midnight.
For scheduling, every row shades its work hours (9 AM–5 PM) in green. Just drag the slider until every row is green and you've found a meeting slot that works for everyone. The tool uses the browser's Intl API with the IANA time zone database, so daylight saving transitions are always accurate — no stale offsets, no manual adjustments.
📝 Example
Input
Reference: New York
Time: 10:00 AM (Monday)
Cities: London, Tokyo, Sydney
Output
New York: 10:00 AM Mon ✓
London: 3:00 PM Mon ✓
Tokyo: 11:00 PM Mon
Sydney: 1:00 AM +1d Tue
In this example only New York and London are in work hours — drag the slider earlier to find an overlap with Tokyo.
⚡ How to Use
- Your local zone is auto-added alongside New York, London, and Tokyo as starter cities
- Click "Add city" to search and add any of 60+ pre-built cities (or remove ones you don't need)
- Drag the time slider (15-minute steps) and watch every city update live
- Look for green rows — that means the city is in work hours (9–5). Find a slider position where every row is green to pick a fair meeting time
- Toggle 12h/24h display with the button in the top-right
- Click "Now" to jump back to the current time in your local zone
🎯 Use Cases
📅 Scheduling meetings
Find a time that works for a team in New York, London, and Bengaluru without awkward maths. The green bars tell you instantly when everyone is awake and at work.
✈️ Travel planning
Quickly see what time it is at your destination so you know when to call family, check in at a hotel, or join a tour without waking someone up.
💼 Remote work
Perfect for distributed teams. Pin the zones of every teammate at the top of your monitor and always know who's online without asking.
🎮 Live events
Watching a game, stream, or product launch scheduled in another country? Convert the start time to your local zone in one click.
🔒 Privacy
- ✓ All conversions run in your browser using the built-in Intl API
- ✓ Your selected cities and times are never sent anywhere
- ✓ Works offline after the page first loads
- ✓ No signup, no ads, no calendar access required
❓ Frequently Asked Questions
How does this time zone converter work?
Pick the cities you care about, then drag the time slider or pick a date and time. Every city row updates live to show the matching local time, including day offset (±1 day) when you cross midnight. Your browser handles the conversion using the official IANA time zone database, so daylight saving transitions are always accurate.
Can I use it to schedule a meeting across time zones?
Yes — that is what the "work hours" highlight is for. Each row shades 9 AM–5 PM in green, so you can instantly see which slots overlap across all the cities you added. Drag the slider until every row is green and you have found a meeting time that works for everyone.
Does it handle daylight saving time?
Yes. The tool uses the browser's built-in Intl API, which is backed by the IANA time zone database. That means spring-forward and fall-back transitions are applied automatically for every city — no manual offsets, no out-of-date data.
Why does the day show +1 or −1?
If you convert 10 PM New York to Tokyo, the result is 11 AM the next day. The "+1" badge means "tomorrow in this city". Similarly "−1" means "yesterday". This matters a lot for meeting scheduling so you do not accidentally book something on the wrong calendar day.
How many cities can I add?
As many as you want. The tool starts with a few common ones (New York, London, Tokyo, your local time), but you can search for any city in the IANA database and add it. Remove cities you do not need with the × button.
What is UTC and why is it shown?
UTC (Coordinated Universal Time) is the global reference time, always the same everywhere regardless of daylight saving. Time zones are defined as offsets from UTC (e.g. New York is UTC-5 in winter, UTC-4 in summer). We show it as a reference point so you can convert to or from UTC quickly.
Is this tool better than just asking an AI?
For a one-off conversion, an AI can answer. But when you have 4 cities, need to see overlapping work hours, and want to drag a slider to find the best slot, a visual tool is dramatically faster. This calculator also always has up-to-date DST rules, unlike a static text answer.
Is my data private?
Yes. Everything runs in your browser using the built-in Intl API. No city list, no times, and no calendar data is ever sent to any server. Works offline after the page first loads.