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Time Zone
Converter

See any meeting time in up to 6 cities at once. A visual timeline shows working hours, evening, and sleeping time for each location so you can find the best slot instantly.

Set a time to convert
24-hour working hours timeline

Finding the overlap window

The golden rule for remote teams: look for the overlap where all participants are in working hours (9am–6pm). US East Coast ↔ London = 5 hours apart, giving a solid morning overlap. US West Coast ↔ London = 8 hours, making overlap tight. US ↔ Asia Pacific often requires someone to take an early morning or late evening call.

Daylight Saving Time

DST causes time zone offsets to shift twice a year — and different countries switch on different dates. The US switches in March and November; Europe switches in March and October. This creates a 2-3 week window each spring and fall where the offset between US and European cities is different than usual. This tool uses your browser's current time, so DST is always correct.

Best tools for async teams

For truly global teams, async communication is often more practical than synchronous meetings. Record loom videos instead of calls where possible. When meetings are necessary, rotate the inconvenient time slots fairly — don't always ask the same person to join at 6am. This converter helps make those decisions visible and fair.

Time zones and invoicing

Always specify the time zone on invoices, contracts, and deadline communications. "Due Friday 5pm" is ambiguous for a client in Tokyo. Adding the timezone ("5:00 PM ET") eliminates confusion. For recurring international relationships, consider specifying UTC as your reference timezone in contracts — it never changes for DST.

Frequently Asked Questions
What is UTC and why does it matter? ▾
UTC (Coordinated Universal Time) is the world's primary time standard — all other time zones are defined as UTC offsets (e.g. Eastern Standard Time is UTC−5, UK GMT is UTC+0, Japan is UTC+9). UTC has no daylight saving adjustments. When scheduling across time zones, convert everything to UTC first to avoid errors. Server logs, APIs, and databases almost always store timestamps in UTC for this reason.
How do I know when Daylight Saving Time changes? ▾
In the US, clocks spring forward the second Sunday of March and fall back the first Sunday of November. Most of Europe changes on the last Sunday of March and October. Many countries — including Japan, India, China, and most of Africa — do not observe DST at all. This tool automatically accounts for current DST status when converting between time zones.
What is the best time for a meeting across US and UK? ▾
The UK is UTC+0 (GMT) in winter and UTC+1 (BST) in summer. The US East Coast is UTC−5 (EST) in winter and UTC−4 (EDT) in summer. The overlap is widest in winter: 9am ET = 2pm GMT, making 9–11am ET / 2–4pm GMT the sweet spot. In summer the difference shrinks by one hour. This tool's meeting planner mode lets you input multiple cities and find the best overlap window automatically.
Why do some countries have half-hour time zones? ▾
Most time zones are whole-hour offsets from UTC, but several countries use 30-minute or 45-minute offsets. India uses UTC+5:30, Sri Lanka UTC+5:30, Afghanistan UTC+4:30, Iran UTC+3:30, and Nepal UTC+5:45. These were set historically to better align solar time with political borders. Australia has states at UTC+9:30 (Adelaide) and UTC+10:30 (Lord Howe Island), which can complicate scheduling within the country.
How do I schedule recurring meetings across time zones? ▾
The key rule: anchor your recurring meeting to a fixed UTC time, not a local time. If you schedule 10am ET every Monday, the UTC time shifts by an hour twice a year when DST changes — which means attendees in time zones that don't observe DST (or change on different dates) experience the meeting shifting by an hour. Scheduling in UTC and having everyone convert locally prevents this drift. Use this tool to find a UTC time that works across all participants' working hours.
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How to Use the Time Zone Converter

Convert times between any time zones and plan meetings across global teams.

01
Enter the base time and date
Select the time you want to convert and the date (important for DST changes around clock-change weekends).
02
Choose your time zones
Select the 'from' and 'to' time zones. Search by city name or UTC offset. Common pairs like NY–London–Singapore are pre-saved for quick access.
03
Add multiple locations
Add 3–6 cities to find overlapping work hours for distributed teams. The colour-coded grid shows which hours are working hours for each location.
04
Check for DST
The converter automatically adjusts for Daylight Saving Time differences. The US and Europe change clocks on different dates — a 5-hour difference can briefly become 4 or 6 hours.
05
Save your team's time zones
Bookmark the page with your team's cities pre-selected. Update the time when scheduling meetings — you never need to do the mental maths again.
💡
💡 UTC (Coordinated Universal Time) never changes for DST. When scheduling international meetings, always sanity-check against UTC, especially during the weeks when different countries change their clocks on different dates.