Timezone Tool
See every timezone on one grid, spot the overlapping working hours at a glance, and click any column to check the exact local time everywhere — no account, no paywall.
Most meeting planners either require you to sign in to save or rename cities, or gate the interactive slider behind a paid plan. This one doesn't — add as many zones as you want, and everything runs in your browser with nothing saved or sent anywhere. Columns are fixed UTC hours across the 24-hour day; each row shows what that instant looks like locally, including a small day-shift marker when the same moment lands on the previous or next calendar date in that zone — a detail that trips up a lot of hand-built scheduling spreadsheets.
Need the exact number of hours between two zones instead of a visual grid? The Timezone Comparison tool on the home page gives you live clocks side by side.
Reference
Overlapping time (or overlapping working hours) is the stretch of the day that falls inside normal business hours for every timezone you're comparing — the window where you can schedule a meeting without asking anyone to join before or after their workday. The grid above shades those hours in teal so you can spot the overlap at a glance, even across three or more zones.
Add each participant's city or timezone above. Each row lines up to the same UTC columns, so any column shaded teal across every row is a time that works for everyone — click it to see the exact local clock time in each zone.
Related
Live clocks across any set of cities, updating every second.
Check if a zone's clocks are about to shift before you schedule.
Build a live countdown to the meeting once you've picked a time.