Panama City is 8 hours behind Helsinki
Best overlap: 4:00 PM to 6:00 PM in Helsinki is 8:00 AM to 10:00 AM in Panama City.
Keep meetings inside 4:00 PM to 6:00 PM in Helsinki — that maps to 8:00 AM to 10:00 AM in Panama City. Panama City is 8 hours behind Helsinki, so you only get about 2 hours of overlap a day — worth locking in a standing time like 4:00 PM in Helsinki (8:00 AM in Panama City) before it slips. Finally, Helsinki observes daylight saving and Panama City doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.