Compare current IANA-zone times and convert a whole meeting hour from the first listed base zone, with local dates and a simple 09:00–17:00 overlap model.
Choose your path
Compare current named-zone times and convert one whole meeting hour from an explicit base zone without hiding date changes or daylight-saving assumptions.
Choose a candidate hour across several regions.
Keep the first zone as the base, select a base-zone hour, review each local date/time, and compare the 09:00–17:00 overlap.
Can copy a date-aware candidate and confirms holidays and personal schedules outside the tool.
See whether a call crosses midnight at the destination.
Add and order the relevant IANA zones, then compare the displayed local dates as well as times.
Notices previous/next-day changes and does not reuse today’s offset for an unrelated future date.
Keep a compact working set of zones on one device.
Add, remove, reset, and reload a normalized list of up to 12 supported zones.
The list persists locally or a visible storage error explains why it did not.
This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.
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Uses named IANA zones through the browser Intl API and displays the zone abbreviation/offset available for each instant.
Clocks derive from the device system clock and refresh every second while the page is active; the tool does not contact an independent time authority.
Checks each UTC hour against a uniform local 09:00–17:00 interval for all selected zones on the current date. Highlighted hours are candidates, not personalized recommendations.
Updated: August 2026
A distributed team manager checks overlapping work hours across New York, London, and Tokyo to find the best meeting time.
A traveler checks destination time to plan calls home and adjust to the new time zone before departure.
A distributed team compares the first zone's selected hour across colleagues' zones, then confirms the exact date and schedules before sending an invitation elsewhere.
View current times in multiple IANA time zones and plan a whole-hour meeting from the first listed base zone. Conversions use the current base-zone calendar date; highlighted overlap assumes 09:00–17:00 everywhere and does not know holidays or personal schedules.