Global Event Time Scheduler
Find the best time to schedule a virtual event so attendees across two time zones can join comfortably. Useful for webinars, team meetings, or live launches with a global audience.
About this calculator
This calculator scores a proposed event time on a 0–100 scale based on how well it suits participants in two different time zones. The core idea is that a start hour close to 14:00 (2 PM) in the primary time zone is considered optimal — deviating from that ideal costs 5 points per hour. Each hour of time-zone offset between primary and secondary audiences costs 2 points, and each hour of event duration costs 3 points, reflecting fatigue and inconvenience. If the event is restricted to business days, a multiplier of 1 is applied (no penalty); otherwise the score may be scaled down. The formula is: Score = max(0, 100 − |preferredStartHour − 14| × 5 − |primaryTZ − secondaryTZ| × 2 − duration × 3) × businessDaysMultiplier. A higher score means better global participation potential.
How to use
Suppose you want a 1-hour webinar starting at 10:00 AM in your primary time zone (UTC+0), targeting a secondary audience in UTC+5, on a business day. Enter preferredStartHour = 10, primaryTimezone = 0, secondaryTimezone = 5, eventDuration = 1, businessDaysOnly = 1. The calculation: |10 − 14| = 4, so −20 points; |0 − 5| = 5, so −10 points; 1 hour duration = −3 points. Score = max(0, 100 − 20 − 10 − 3) × 1 = 67. A score of 67/100 suggests reasonable but not ideal overlap — try shifting the start to 12:00 to gain 10 more points.
Frequently asked questions
What does the participation score mean in the global event scheduler?
The score represents how convenient the chosen event time is for both your primary and secondary audiences, expressed on a scale of 0 to 100. A score near 100 means the timing is close to ideal for both groups — near 2 PM local time for the primary audience with minimal time-zone separation. Scores below 50 suggest the event will be inconvenient for at least one audience, potentially reducing attendance. Use it as a quick comparison tool when evaluating different time slots.
How does time-zone difference affect the best event scheduling time?
Every hour of offset between your two audience time zones reduces the score by 2 points, because a time that is comfortable for one group will be proportionally less comfortable for the other. For example, a 6-hour gap (e.g., New York vs. London) costs 12 points before any other factors are considered. The larger the offset, the harder it is to find a mutually convenient window. In extreme cases — such as scheduling between North America and Asia-Pacific — consider splitting the event into two sessions.
Why does a longer event duration lower the global scheduling score?
Each additional hour of event duration deducts 3 points from the score, because longer sessions increase the chance that part of the meeting falls outside comfortable working hours for one audience. A 2-hour event costs 6 points; a 3-hour event costs 9. This nudges organizers toward shorter, more focused sessions when coordinating across time zones. If a long event is unavoidable, scheduling it as close to 14:00 in the primary time zone as possible helps offset the duration penalty.