How to Schedule Events Across Time Zones

With everyone in one time zone, scheduling is straightforward — you just need to find date overlap. People check their calendars, pick a day that works, and you're done. But when your group spans multiple time zones, each date suddenly has different usable hours for each person, and the problem becomes multidimensional.

A "simple" 10 AM meeting for someone in New York is 3 PM in London and 10 PM in Tokyo. What feels like a perfectly reasonable time for one person is the middle of the night for another. The overlap of reasonable working hours shrinks fast as you add more time zones to the mix, and with each additional zone the number of viable slots drops dramatically.

This is why the email chain approach completely falls apart for international groups. When someone suggests "Tuesday at 2 PM," the immediate question is "2 PM where?" — and suddenly you're juggling conversions, daylight saving transitions, and the realization that there may be no single hour that's convenient for everyone.

When scheduling events (not recurring meetings), one of the most effective strategies is to focus on finding the right date before worrying about the specific time. This two-step approach is far simpler than trying to solve both variables simultaneously, and it works especially well for one-off events, workshops, and group gatherings.

If your group spans the US and Europe, for example, start by agreeing on a date that works for everyone's broader schedule — no one has conflicts, vacations, or competing commitments. Once you've locked in the date, then narrow down to a time window that falls within reasonable hours for all participants. By separating these two decisions, you avoid the combinatorial explosion of trying to evaluate every possible date-time pair at once.

This approach also respects how people actually think about their availability. Most people know their date-level commitments off the top of their head — they know they're traveling next week or have a dentist appointment on Thursday. The hour-by-hour details come later, and that's fine.

When you do need to pin down a specific time, use UTC as a common reference point when discussing options. Rather than saying "3 PM my time," say "19:00 UTC" and let each person convert to their own local time. This eliminates ambiguity and reduces the chance of someone showing up an hour late because they forgot about daylight saving time.

Identify the "overlap window" — the hours when all time zones in your group have reasonable availability. For groups spanning the Americas and Europe, this typically falls in the mid-morning for the Americas and late afternoon for Europe, roughly between 14:00 and 18:00 UTC. For groups that also include Asia-Pacific, the window narrows further or may require some participants to join outside normal working hours.

For events like retreats, offsites, or trips where people will be traveling to a shared location, time zones matter far less in the planning stage. In these cases, focus entirely on finding dates that work — everyone will be in the same place once the event starts, so the time zone question resolves itself.

When evaluating scheduling tools, look for ones that automatically display dates and times in each respondent's local time zone. A tool that shows "Tuesday 2 PM" without specifying whose 2 PM it is will cause confusion and missed meetings. The best tools detect each user's time zone and present everything in their local context, so there's never any ambiguity.

WhatDate.Works takes a different approach that sidesteps the time zone display issue entirely. By focusing on date-level polling rather than hour-by-hour scheduling, everyone sees the same calendar dates regardless of where they are. May 15th is May 15th whether you're in San Francisco, Berlin, or Singapore. This makes it ideal for planning events, trips, and gatherings where the date matters more than the specific meeting hour.

Whatever tool you choose, make sure it doesn't require respondents to manually select or input their time zone. That's a friction point that leads to errors and abandoned responses. The best tools handle time zone detection automatically and transparently.

Do not default to your own time zone and expect others to convert. This is one of the most common and most frustrating scheduling habits in distributed teams. When you say "let's meet at 3 PM" without any qualifier, you're implicitly telling everyone else that your time zone is the default and their job is to figure out what that means for them.

Always specify time zones when proposing times. Write "3 PM ET / 8 PM GMT / 9 PM CET" rather than just "3 PM." Yes, it takes a few extra seconds, but it saves everyone else the mental overhead of converting — and eliminates the risk of someone getting it wrong. If you're sending a calendar invite, double-check that the time zone is set correctly before hitting send.

For recurring meetings, rotate the meeting time periodically to share the inconvenience. If your Asia-Pacific colleagues always join at 10 PM their time so that North America can meet at a comfortable morning hour, that's not equitable. Alternating between time slots that favor different regions shows respect and keeps everyone engaged over the long term.

Finally, be mindful that some time zones have half-hour or even 45-minute offsets. India is UTC+5:30, Nepal is UTC+5:45, and parts of Australia use UTC+9:30. Don't assume all time zones fall on the hour — a meeting at "the top of the hour" might be at :30 or :45 for some of your participants.

For multi-day events, offsites, group trips, and retreats, the date itself matters far more than the meeting time. Planning a team retreat means finding a week that doesn't conflict with anyone's vacation, a major conference, or a family obligation. The specific hour you kick off on day one is a minor detail by comparison.

A date-polling approach works perfectly for these scenarios because calendar dates are universal. May 15th is May 15th everywhere in the world. There's no conversion needed, no ambiguity, and no risk of someone misinterpreting which day you mean. Everyone can look at the same set of proposed dates and respond with their availability in seconds.

This is also true for deadlines, milestones, and launch dates. If you're coordinating a product launch across global offices, the launch date is what needs alignment — the exact hour each region goes live can be figured out separately. By focusing on dates first and times second, you keep the planning process simple and reduce the cognitive load on everyone involved.