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.
Stated as happening, per the Mayor's Office transcript dated "September 10, 2026": "It is a pleasure to be here in Washington Heights on the first day of school" with "the first members of New York City's inaugural 2-K class".
The state's release on the launch day: more than 2,000 children, the $73 million initial investment rising to $425 million by 2027, and the savings figure.[1]
Independent education reporting from the first day, including the four boroughs served and providers' unpaid contracts.[1]
The January announcement of the 2-K plan that this launch delivers.[1]
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