A free time zone overlap calculator that finds the hours 2 or more places share, in each place's own time, daylight saving included.
5,0(1 rating)Add 2 or more places to find their time zone overlap: the hours they share, in each place's own time.
The places and their hours
The day
The hours you share
Add at least 2 places.
This free time zone overlap calculator shows the hours 2 or more places share, in each place's own time.
Add up to 6 places, each with its own hours. It finds the overlap on the day you pick, daylight saving included, and draws everyone's day side by side.
Here's how much common pairs overlap, the daylight saving weeks that catch people out, and what to do when there's no overlap at all.
TL;DRKey takeaways
What is a time zone overlap?
A time zone overlap is the part of the day when everyone's hours line up across time zones.
With a team in  Lisbon and a client in  New York, both working 9 to 5, the overlap is 3 hours: 2 PM to 5 PM in Lisbon, 9 AM to noon in New York.
How much common pairs overlap
Here's the overlap for 10 pairs, with both places working 9 to 5:
- September 28, 2026
- 3 hours
- January 12, 2026
- 3 hours
- September 28, 2026
- 2 hours
- January 12, 2026
- 2 hours
- September 28, 2026
- 5 hours
- January 12, 2026
- 5 hours
- September 28, 2026
- 6 hours
- January 12, 2026
- 7 hours
- September 28, 2026
- 2 hours
- January 12, 2026
- 3 hours
- September 28, 2026
- 5 hours
- January 12, 2026
- 4 hours
- September 28, 2026
- 2 hours
- January 12, 2026
- 1 hour
- September 28, 2026
- 1 hour
- January 12, 2026
- None
- September 28, 2026
- 1 hour
- January 12, 2026
- 3 hours
- September 28, 2026
- None
- January 12, 2026
- None
The pairs change with the season because some places change their clocks and others don't.
Daylight saving changes the overlap
Countries change their clocks on different dates, and some never do. Here are the dates for 2026:
United States- Clocks go forward
- March 8
- Clocks go back
- November 1
United Kingdom and the EU- Clocks go forward
- March 29
- Clocks go back
- October 25
Sydney- Clocks go forward
- October 4
- Clocks go back
- April 5
Mexico City- Clocks go forward
- No change
- Clocks go back
- No change
Bogotá- Clocks go forward
- No change
- Clocks go back
- No change
São Paulo- Clocks go forward
- No change
- Clocks go back
- No change
Bali- Clocks go forward
- No change
- Clocks go back
- No change
Bangkok- Clocks go forward
- No change
- Clocks go back
- No change
Dubai- Clocks go forward
- No change
- Clocks go back
- No change
So for 3 weeks in March and 1 week in late October, the US and Europe are an hour closer than usual. Lisbon and New York get 4 hours instead of 3.
The calculator asks for a day for this reason. It uses your browser's own time zone data, so the dates are right.
Working with New York from abroad
If your clients are on US East Coast time, Latin America keeps the most of your day. Here's the overlap with New York, both working 9 to 5:
Medellín- September 28, 2026
- 7 hours
- January 12, 2026
- 8 hours
Panama City- September 28, 2026
- 7 hours
- January 12, 2026
- 8 hours
Buenos Aires- September 28, 2026
- 7 hours
- January 12, 2026
- 6 hours
Mexico City- September 28, 2026
- 6 hours
- January 12, 2026
- 7 hours
Lisbon- September 28, 2026
- 3 hours
- January 12, 2026
- 3 hours
London- September 28, 2026
- 3 hours
- January 12, 2026
- 3 hours
Barcelona- September 28, 2026
- 2 hours
- January 12, 2026
- 2 hours
Dubai- September 28, 2026
- None
- January 12, 2026
- None
Da Nang- September 28, 2026
- None
- January 12, 2026
- None
Bali- September 28, 2026
- None
- January 12, 2026
- None
Asia works for US clients only if you work their hours, or your calls happen early in your morning.
Working with London from abroad
For European clients, most of Europe and Africa keep a full day, and the Gulf keeps half of it:
Lisbon- September 28, 2026
- 8 hours
- January 12, 2026
- 8 hours
Barcelona- September 28, 2026
- 7 hours
- January 12, 2026
- 7 hours
Cape Town- September 28, 2026
- 7 hours
- January 12, 2026
- 6 hours
Dubai- September 28, 2026
- 5 hours
- January 12, 2026
- 4 hours
New York- September 28, 2026
- 3 hours
- January 12, 2026
- 3 hours
Medellín- September 28, 2026
- 2 hours
- January 12, 2026
- 3 hours
Bangkok- September 28, 2026
- 2 hours
- January 12, 2026
- 1 hour
Da Nang- September 28, 2026
- 2 hours
- January 12, 2026
- 1 hour
Mexico City- September 28, 2026
- 1 hour
- January 12, 2026
- 2 hours
Bali- September 28, 2026
- 1 hour
- January 12, 2026
- None
Da Nang is one of my favorite places to live as a nomad. It shares no 9-to-5 hours with New York, and 1 or 2 with London, so it suits work you can do on your own clock.
Where you base yourself also sets how long you can stay: check the visa-free countries map, and count your days with the 183-day rule calculator.
When there's no overlap
Add Singapore to Lisbon and New York, and 9 to 5 in all 3 has no overlap at all.
Then someone has to stretch, or the work moves to writing. Here's what works for remote teams:
- Share the early and late calls, so the same person isn't always up at 7 AM
- Write decisions down, so people in other zones don't wait for a call
- Record short video updates instead of meetings
- Keep 1 shared hour a week for the conversations that need a call
Change 1 place's hours in the calculator, say 7 AM to 3 PM in New York, and watch the overlap appear.
How to use the time zone overlap calculator
Own your time, or someone else will.
Who is the time zone overlap calculator for?
It's for remote teams, founders with clients abroad, and digital nomads who work with people back home.
If you're building a team across time zones, Chris Ducker's book on working with virtual staff is a good start:
Virtual Freedom
by Chris Ducker
Virtual Freedom by Chris Ducker shows entrepreneurs how to stop doing everything themselves by hiring, training and managing virtual assistants.
I may earn a commission if you make a purchase, at no additional cost to you.
On the road, pair it with the golden hour calculator for your shoots and the Schengen calculator for your days in Europe. See how I use AI to run my business from anywhere, what a global citizen is, and more tools on the free travel tools page.
Time Zone Overlap Calculator FAQs
Questions about time zone overlap? Here's what to know.
A time zone overlap is the part of the day when everyone's hours line up across time zones.
The calculator shows it in each place's own time.
London and New York overlap 3 hours when both work 9 to 5.
In the weeks when only 1 of them has changed its clocks, it's 4.
In 2026, US clocks go forward on March 8 and back on November 1, and UK and EU clocks go forward on March 29 and back on October 25.
The time zone overlap calculator handles daylight saving time with your browser's own time zone data, for the day you pick.
The time zone overlap calculator compares up to 6 places, each with its own hours.
If there's no overlap, change 1 place's hours, and the calculator shows the overlap as soon as there is one.
The time zone overlap calculator is free, with no sign-up.
The time zone overlap calculator is for remote teams, founders with clients abroad and digital nomads.
I did. I'm Navid Moazzez, and the time zone overlap calculator is one of my free tools on navid.me.
Read about me.
For travel, you can also use the passport index, the passport comparison, the second passport calculator, the visa-free countries map, the Schengen calculator, the 183-day rule calculator, the travel advisory map, the golden hour calculator, the time zone converter and the countries visited map, all free on navid.me.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
More free tools
X
Bluesky
LinkedIn
Threads
Mastodon
Instagram
TikTokRelated MCP servers & CLIs
Substack
Apple Podcasts
Free AI newsletterThe most actionable AI newsletter for founders
Every week, get proven AI strategies, curated tools, and step-by-step systems to grow your audience, create better content, and build a profitable creator business.
No fluff, no filler, no BS. Just five minutes each week that might level up your online business and life.
P.S. Sign up now to get free access to my ultimate AI tools guide for creators.
