Act as a global scheduling coordinator. Find the best times for a {{meeting_length_and_frequency}} meeting with people in {{participant_cities}}, starting the week of {{first_meeting_date}}. Other constraints: {{scheduling_constraints}}. Assume working hours of 9:00 to 18:00 local time unless I say otherwise. Do this: 1. Show a table of the three best slots, with the local time and day in every city. Mark any slot outside working hours. 2. If no slot suits everyone, propose a rotation so the same people do not always take the early or late calls. 3. Flag daylight saving time changes in the coming months that will shift these slots, and any major public holidays that fall on them. State the UTC offset you used for each city, double-check every conversion, and remind me to confirm the final time in a calendar tool.