Best candidate slot
10 Mar, 12:00 - 10 Mar, 13:00 UTC
Overall 73.64 | Fairness 72.52
Freelance to Founder
Time Zone Overlap Planner
Find fair meeting windows across 2-8 time zones with rotation ideas and DST-aware warnings.
Overlap Results
Global Team Map
Participant locations and local candidate times for the current best slot.
New York
New York
08:00 - 09:00 (America/New_York)
London
London
12:00 - 13:00 (Europe/London)
Bangalore
Bangalore
17:30 - 18:30 (Asia/Kolkata)
Top Slot Scoreboard
Overall score ranking for the strongest candidate windows.
#1 10 Mar, 12:00 - 10 Mar, 13:00 UTC
Fairness 72.52 | Inconvenience 2.5
73.64
#2 11 Mar, 12:00 - 11 Mar, 13:00 UTC
Fairness 72.52 | Inconvenience 2.5
73.64
#3 12 Mar, 12:00 - 12 Mar, 13:00 UTC
Fairness 72.52 | Inconvenience 2.5
73.64
#4 13 Mar, 12:00 - 13 Mar, 13:00 UTC
Fairness 72.52 | Inconvenience 2.5
73.64
#5 14 Mar, 12:00 - 14 Mar, 13:00 UTC
Fairness 72.52 | Inconvenience 2.5
73.64
Best Slot Inconvenience
Lower values mean less local-time stress for participants.
New York
08:00 to 09:00
1.0
London
12:00 to 13:00
0.0
Bangalore
17:30 to 18:30
1.5
Top candidate windows
| UTC window | Overall | Fairness | Local times |
|---|---|---|---|
| 10 Mar, 12:00 - 10 Mar, 13:00 UTC | 73.64 | 72.52 | New York 08:00-09:00 | London 12:00-13:00 | Bangalore 17:30-18:30 |
| 11 Mar, 12:00 - 11 Mar, 13:00 UTC | 73.64 | 72.52 | New York 08:00-09:00 | London 12:00-13:00 | Bangalore 17:30-18:30 |
| 12 Mar, 12:00 - 12 Mar, 13:00 UTC | 73.64 | 72.52 | New York 08:00-09:00 | London 12:00-13:00 | Bangalore 17:30-18:30 |
| 13 Mar, 12:00 - 13 Mar, 13:00 UTC | 73.64 | 72.52 | New York 08:00-09:00 | London 12:00-13:00 | Bangalore 17:30-18:30 |
| 14 Mar, 12:00 - 14 Mar, 13:00 UTC | 73.64 | 72.52 | New York 08:00-09:00 | London 12:00-13:00 | Bangalore 17:30-18:30 |
| 15 Mar, 12:00 - 15 Mar, 13:00 UTC | 73.64 | 72.52 | New York 08:00-09:00 | London 12:00-13:00 | Bangalore 17:30-18:30 |
| 16 Mar, 12:00 - 16 Mar, 13:00 UTC | 73.64 | 72.52 | New York 08:00-09:00 | London 12:00-13:00 | Bangalore 17:30-18:30 |
| 10 Mar, 12:30 - 10 Mar, 13:30 UTC | 72.14 | 69.8 | New York 08:30-09:30 | London 12:30-13:30 | Bangalore 18:00-19:00 |
4-week fairness rotation
- Week 1: 10 Mar, 12:00 - 10 Mar, 13:00 UTC (fairness 72.52)
- Week 2: 11 Mar, 12:00 - 11 Mar, 13:00 UTC (fairness 72.52)
- Week 3: 12 Mar, 12:00 - 12 Mar, 13:00 UTC (fairness 72.52)
- Week 4: 13 Mar, 12:00 - 13 Mar, 13:00 UTC (fairness 72.52)
Methodology →
Formula, assumptions, sources, and known limits.
How to use it
- Enter 2-8 participants with their time zones and working-hour windows, then set meeting duration, start date, date range, and slot interval. Narrow work windows and long meeting durations usually matter more than timezone count alone when overlap disappears.
- Read the ranked candidate slots with overlap score, fairness score, overall score, local start and end times, plus the 4-week rotation plan. Scores closer to 80-100 usually mean the meeting is workable, while a no-slot result means your work windows are too tight for the chosen duration.
- Judge recurring meetings by fairness, not just availability. If the same region repeatedly carries 06:00 or 22:00 local slots, the process is operationally unfair even when a legal overlap exists.
- Use the top two or three candidate windows to set a recurring schedule, then adopt the rotation plan if inconvenience cannot be shared in a single static slot. Before widening the meeting, try adding just 1 hour of flexibility to one region rather than pushing everyone off-hours.
- Re-run before daylight-saving transitions, major hiring changes, or any shift in regional work hours. Track burden by region over each quarter so one office does not accumulate the inconvenience tax by default.
AI Integrations
Contract, discovery endpoints, and developer notes for agent use.
Always available for agents
AI Integrations
Contract, discovery endpoints, and developer notes for agent use.
Tool contract JSON
https://aibizhub.io/contracts/time-zone-overlap-planner.jsonStable input and output contract for this exact tool.
Human review
People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.
- /agent-tools.json - machine-readable tool index.
- /llms.txt - human-readable model discovery guide.
- /.well-known/webmcp.json - WebMCP capabilities manifest.
- /.well-known/ai-plugin.json - plugin-style discovery manifest.
{
"tool": "timezone_overlap_planner",
"participants": [
{
"id": "nyc",
"name": "New York",
"time_zone": "America/New_York",
"work_start_hour": 9,
"work_end_hour": 17
},
{
"id": "lon",
"name": "London",
"time_zone": "Europe/London",
"work_start_hour": 9,
"work_end_hour": 17
},
{
"id": "blr",
"name": "Bangalore",
"time_zone": "Asia/Kolkata",
"work_start_hour": 10,
"work_end_hour": 19
}
],
"meeting_duration_minutes": 60,
"start_date": "2026-03-10",
"range_days": 7,
"slot_interval_minutes": 30
} Expand developer notes
Agent playbook
- Resolve Time Zone Overlap Planner from /agent-tools.json and open its contract before execution.
- Validate inputs against the contract schema instead of scraping labels from the page UI.
- Open the browser page only when a person wants to review charts, assumptions, or related tools.
Agent FAQ
Should ChatGPT, Claude, or another agent click through the UI?
No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.
When do tools show Quick and Advanced?
Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.
When should an agent still open the browser page?
Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.
Questions people usually ask
How many participants can I include?
This planner supports 2 to 8 participants and ranks deterministic overlap windows across a selected date range.
How does fairness rotation work?
The planner selects top windows while rotating inconvenience burden across weeks to avoid repeatedly penalizing the same region.
Does it handle DST changes?
Yes. It checks timezone offsets across the selected range and flags DST transitions that may shift local meeting times.
Is this tool free and private to use?
Yes. AI Biz Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Is this professional advice?
No. Outputs are business planning estimates — not legal, tax, or accounting advice.
Related Resources
Learn the decision before you act
Every link here is tied directly to Time Zone Overlap Planner. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.
How To Use
5 STEPSHow to Use Meeting Cost Calculator
Calculate the true financial impact of your business meetings. Learn to use the Meeting Cost Calculator to identify waste, improve efficiency, and save your company money on unproductive gatherings.
ReadHow To Use
5 STEPSHow to Use Time Zone Overlap Planner
Optimize global team collaboration with the Time Zone Overlap Planner. Find ideal meeting times across different regions, boost productivity, and improve remote communication efficiency.
ReadStatistics
15 STATS15 Remote Work Statistics
Recent Remote Work statistics with source attributions and context that explains why the numbers matter.
ReadContinue With Related Tools
Employee Cost Calculator
Know the true cost before you hire — salary, taxes, benefits, and overhead in one view so there are no surprises.
Cost Per Hire Calculator
Know what recruiting really costs — ads, agency fees, internal time, and onboarding per position filled.
Cash Conversion Cycle Calculator
See how long your cash is trapped — measure the full cash conversion cycle from DIO, DSO, DPO, and monthly COGS.
Inventory Turnover Calculator
Check whether your inventory is moving fast enough — turnover ratio and days sales with industry context.
More in Freelance to Founder
Set rates, protect margins, and plan the transition from client work to product.
Freelance Rate + Capacity Planner Consulting Day Rate Calculator Project Pricing Calculator Freelance Tax Estimator
Read the full Freelance to Founder guide →