The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Wikipedia gives "June and August 2027 (presumptive)" and states the first round will be held "in June 2027" with a runoff in August; with only the month fixed, the pin takes the last day of June.
Guatemalan outlet on the forming 2027 field; cited by the article and live (HTTP 200).[1]
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.