How is timezone overlap finder calculated?
Overlap = intersection of working intervals converted to UTC. 2026-09-14, 09:00–17:00 in New York and London overlaps at 13:00–16:00 UTC: 3 hours. All calculations happen in your browser and use the inputs you provide. Check the assumptions below before using your result to make a scheduling or cost decision.
| Calculation | Method |
|---|---|
| Formula | Overlap = intersection of working intervals converted to UTC |
| Example | 2026-09-14, 09:00–17:00 in New York and London overlaps at 13:00–16:00 UTC: 3 hours. |
What should I know before using the result?
Uses the selected calendar date separately in each time zone, with one shared work window. Date-specific IANA offsets include DST. Overnight windows are not supported. UTC and local intervals are displayed.
What do people ask about this tool?
Use the questions below to check the calculation method, compare this tool with a calendar, validate your assumptions, keep your results, and resolve common input errors.
How does the timezone overlap finder work?
Overlap = intersection of working intervals converted to UTC. 2026-09-14, 09:00–17:00 in New York and London overlaps at 13:00–16:00 UTC: 3 hours.
How is this different from a calendar app?
TimeDojo handles a single time decision in your browser. It does not require an account, connect to a calendar, or synchronize information to a server. You can use the tool directly without exploring the game world.
What assumptions should I check?
Uses the selected calendar date separately in each time zone, with one shared work window. Date-specific IANA offsets include DST. Overnight windows are not supported. UTC and local intervals are displayed.
Can I keep or copy my result?
Use Copy result to place the current result on your clipboard. Save journey stores earned experience on this device only. The planner also supports a separate Save plan button and CSV export.
Why am I seeing an input error?
Check that every required field is filled, dates and times are valid, and numeric values are within the stated ranges. Correct the highlighted message and calculate again. Invalid inputs are never awarded experience.
Is my data uploaded?
Your inputs and results are calculated locally in your browser. No account or cloud database is used. Local storage is written only when you explicitly choose a Save action, and Clear local data removes saved TimeDojo progress and plans.
What can I explore next?
Choose another tool to plan your day, compare time zones, or make room for focused work.
Updated: 2026-09-14 · Local-first. No signup. No cloud storage.