Pick cities and working hours — see the exact window when a meeting suits everyone. Free, no sign-up, recalculated with current DST. Embed it anywhere with the snippet below.
Free to embed — the widget shows the live overlap for the cities you picked above and links back to this tool.
Now do it with real calendars
The window only helps if it's actually free. OpenSlot reads Outlook free/busy for everyone on the invite and hands you a paste-ready list of times that truly work.