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.
Happened as dated, per macrumors.com: "iPhone 6 Said to Launch on Friday, September 19 in 32 GB and 64 GB Variants A…"
Wikipedia confirms the iPhone 6 and 6 Plus were "released on September 19, 2014" in major markets including the US, matching the pin's stored date precisely.
Apple's[4] own newsroom release confirms devices "became available to customers on Friday, September 19, 2014," directly matching the pin's stored Sept 18-20 window and its title.
Apple's[3] September 9, 2014 announcement states iPhone 6 and 6 Plus "will be available ... beginning on Friday, September 19," matching the pin's claim and stored date exactly.
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.