Time Zone Planner
A time zone planner is a cross-border scheduling utility that compares active hours across global cities simultaneously on a 24-hour visual matrix. It identifies optimal overlapping business hours (9 AM to 5 PM) between remote team members in cities like New York, London, Tokyo, and Sydney to eliminate scheduling friction.
By Daniel Okoro (Mathematics Editor) · Reviewed by Maya ChenUpdated · Published
🟢 Business hours
🟢 Business hours
Mutual 9 AM–5 PM overlap exists between 9:00 AM – 1:00 PM (New) which corresponds to 2:00 PM – 6:00 PM (London).
How Does the Time Zone Calculator Work?
- Select your origin city (e.g. New York, London, Tokyo, San Francisco).
- Add one or more destination cities to compare.
- Check the 24-hour color-coded timeline matrix: Green indicates mutual 9 AM to 5 PM business hours, Yellow indicates early morning/evening, and Dark indicates sleep hours.
- Pick the best mutually agreeable meeting window.
What Is the Time Zone Formula?
Compute exact local wall-clock times by adjusting for the algebraic difference between UTC time zone offsets.
How Do You Calculate Time Zone Step by Step?
Scheduling a 1-hour video call between New York (UTC-5) and London (UTC+0)Time difference: London is 5 hours ahead of New York
New York 9:00 AM = London 2:00 PM (both within regular business hours)
New York 12:00 PM = London 5:00 PM (end of London business day)
Optimal overlap window: 9:00 AM to 12:00 PM New York time