Scheduling a Meeting Across Multiple Time Zones Without Errors
Convert a proposed meeting time to each participant's local time zone individually, using a specific date (not just a generic time) since daylight saving transitions can shift the correct offset — the most reliable method is picking the time in one reference zone first, then converting to every other zone for that same specific date.
A meeting time that works perfectly for one group and lands at an unreasonable hour for another is one of the most common cross-timezone mistakes, and it's almost always avoidable with one extra verification step.
A worked example
Proposing a meeting at 9:00 AM Eastern Time: that's 6:00 AM Pacific Time (a difficult early call for that group), 2:00 PM in London, and 11:00 PM in Singapore that same day — clearly unworkable for the Singapore team. Shifting the reference time to 8:00 AM Pacific instead gives 11:00 AM Eastern, 4:00 PM London, and 1:00 AM Singapore the next day — better for two groups, but still poor for a third, illustrating why a truly universal time rarely exists across very distant zones.
Why the specific date matters
Time zone offsets aren't fixed year-round in regions that observe daylight saving time — the gap between, say, Eastern and Central European time can shift by an hour depending on the date, since different regions transition to and from daylight saving on different calendar dates. Converting for a generic "typical day" instead of the actual meeting date is a common source of a meeting landing an hour off from what was intended.
A practical process that avoids errors
Pick a candidate time in one reference zone, convert it explicitly for every other participant's zone on the actual proposed date, and share the meeting invite using each recipient's local time (or a UTC time paired with a note) rather than a single time zone label that requires everyone else to do their own mental conversion.