Time Zone Meeting Planner Calculator
Scheduling across time zones means one instant shows up as different clock times for each attendee. Enter your meeting time and your UTC offset, then the UTC offsets of two other locations. The calculator converts your time to Coordinated Universal Time and then out to each location, so everyone knows when to join. Because daylight saving rules vary, you supply the offset that applies on the meeting date.
How the conversion works
UTC time = local time - your UTC offset
Location time = UTC time + that location's UTC offset
(a day rollover is shown as +1 day or -1 day)
All arithmetic is done in hours from midnight, then wrapped to a 24-hour clock. When a converted time crosses midnight, the result notes whether it lands on the previous or next day.
Worked example
A meeting at 14:30 at UTC minus 5 (New York standard time) is 19:30 UTC. For London at UTC plus 0 that is 19:30 the same day. For Tokyo at UTC plus 9 that is 04:30 the next day.
Time zone planning: frequently asked questions
How does this time zone meeting planner work?
Enter the meeting time in your time zone and your UTC offset. Then enter the UTC offsets of two other locations. The calculator converts to Coordinated Universal Time first, then to each location's local time, so everyone sees the same instant expressed in their own clock.
What is a UTC offset?
A UTC offset is the number of hours a time zone is ahead of or behind Coordinated Universal Time. For example New York in standard time is UTC minus 5, and London in standard time is UTC plus 0. Enter the offset including its sign.
Does it handle daylight saving time?
Daylight saving rules differ by region and change with the date, so this calculator uses the UTC offsets you supply. During daylight saving, use the summer offset (for example New York becomes UTC minus 4). Enter the offset that applies on the meeting date.
Why convert through UTC?
Coordinated Universal Time is a single global reference with no daylight saving. Converting every local time to UTC first, then back out to each location, avoids errors from adding and subtracting offsets directly between two zones.
Official sources
- U.S. National Institute of Standards and Technology, time and frequency: nist.gov.
- Coordinated Universal Time is the global civil time standard.
Reviewed by the CalculatorHub team, edited by James Graham, 19 June 2026. See our methodology.