Drag through the day. Every timezone stays in lockstep.
Syncing meridians…
How to use Timezone Converter
1Your four default participants appear stacked as horizontal strips. The top row is the anchor — its midnight sets the strip origin.
2Drag the cyan cursor on any row. Every other row slides to the matching local time at the exact same moment.
3Add participants with "+ Add participant". Remove with the × on any row. Promote a row to anchor with the "Anchor ↑" button.
4Working hours (09–17 local) glow cyan in every row. When the cursor sits in cyan for all participants, you have a shared working window.
01 · Real-world fits
Common use cases
Finding a meeting time that works for a distributed remote team
Scheduling calls with international clients across many zones
Planning a product launch that has to hit several regions in sequence
Coordinating a livestream or release so it lands in working hours for most viewers
02 · The honest pitch
Why Timezone Converter?
Most timezone converters show one moment at a time, forcing you to scrub back and forth mentally to find a shared window. Our strip shows two full days for every participant simultaneously, and the cursor keeps everyone in lockstep. Working-hour bands make the answer visible — you literally see where the green zones align. No more scratch math on napkins.
03 · Edge cases
Frequently asked questions
Cyan = working hours (09–17 local). Violet = evening (17–21). Blue = early morning (06–09). Dark = night and late night. The bands are tinted in each participant's local time, so the same cursor position can sit in cyan for one row and dark for another — that tells you whether the moment is mutually workable.
Click the "Anchor ↑" button on any non-anchor row. That row becomes the new top and its midnight sets the new strip origin. Useful when you're scheduling relative to a different team.
The cursor snaps to 15-minute increments. Use keyboard arrows for 15-minute steps, Shift+arrows for 1-hour, and Cmd/Ctrl+arrows for 3-hour jumps. Home/End fly to the ends of the strip.
Yes. We use the IANA timezone database via date-fns-tz, so DST transitions land correctly — even when the anchor crosses a DST boundary on the strip itself.
In your browser's localStorage under `it:chronos:converter:v1`. They persist across sessions on this device and are never sent to a server.
The cyan line is the cursor — the moment you're inspecting. The faint vertical tick labeled NOW is the real-time marker. Hit "⟲ Return to present" to snap the cursor back to the NOW tick.