Multi-time-zone meeting planner
One instant, read in every attendee's IANA time zone: local time, UTC offset, day shift, and a working-hours flag. DST is whatever the zone database says for that date, which is exactly why you plan with a real one.
Encoding & dataRuns locally in your browser, on its own IANA zone data. Nothing is sent anywhere.
API endpointGEThttps://ronutz.com/api/v1/timezone-meeting-plannerDocumented, not served. Opens the specification.