Four-party scheduling is not just a conversion problem. It is a fairness problem. A time that appears reasonable in the organizer’s calendar may fall before sunrise for one participant and after dinner for another. The safest method is to compare the same instant in every participant’s local time, identify the normal workday for each location and then rotate inconvenience when a perfect overlap does not exist.
Start with locations, not abbreviations
Use a city or an IANA time-zone identifier such as America/Toronto or Australia/Sydney. Short labels such as CST and IST can describe more than one zone. A city-based selection also applies the correct daylight-saving rule for the date you choose.
Look for the green overlap
Enter up to four locations in the meeting planner. Green blocks represent typical 9-to-5 hours, amber blocks represent early morning or evening, and indigo blocks represent normal sleeping hours. Begin with times that keep everyone green. If none exist, choose a slot with no indigo participants and the fewest amber participants.
Use fairness, not seniority, as the default
When a team meets repeatedly, do not give the same region the difficult slot every week. Record which participants are early or late and rotate the burden. The planner’s fairness score is a quick comparison, not a judgment about any individual’s availability.
Confirm the local date
Meetings that cross the Pacific often land on a different calendar day. Always copy the summary with each city’s day and date. For recurring meetings, check several future dates because daylight-saving changes can shift one region while another stays fixed.
Put the method into practice
Convert a specific date and time or compare up to four participant locations. No account or calendar connection is required.