{"tool":"planetary-hours","title":"Planetary Hours Calculator Today","summary":"Calculates the current planetary hour and the full 24-hour schedule from local sunrise and sunset for any coordinates.","calculation_version":"1.1.0","methodology_url":"https://vedara.me/tools/planetary-hours#methodology","operationId":"calculate_planetary_hours","input_schema":{"type":"object","required":["latitude","longitude"],"additionalProperties":false,"properties":{"latitude":{"type":"number","minimum":-90,"maximum":90,"description":"Location latitude in decimal degrees.","example":51.5074},"longitude":{"type":"number","minimum":-180,"maximum":180,"description":"Location longitude in decimal degrees.","example":-0.1278},"date":{"type":"string","pattern":"^\\d{4}-\\d{2}-\\d{2}$","nullable":true,"description":"Optional local calendar date (YYYY-MM-DD); defaults to today in the resolved timezone.","example":"2026-08-30"},"timezone":{"type":"string","nullable":true,"description":"Optional IANA timezone id; when omitted it is derived from the coordinates.","example":"Europe/London"}}},"example_request":{"latitude":51.5074,"longitude":-0.1278,"date":"2026-08-30","timezone":"Europe/London"},"disclaimer":"Traditional planetary-hour timing for reflection; observed sunrise and sunset can vary with local terrain and weather."}