to
working hours
awake
asleep (22–7)
everyone available
ZoneSync Pro idea — save teams, generate a shareable poll link, one-click “add to calendar” with the right local times, and Slack/Google Calendar sync. Free for ad-hoc use; $4/mo for saved teams & scheduling links via Stripe.
Columns are hours of the first person's day. Each cell shows that person's local time; “+1/−1” marks a different calendar day. Overlap is computed live with the browser's time-zone database, so daylight-saving is handled automatically.