MacArthur Foundation — Founded Date: Jan 1978

NoteThe source directly states the MacArthur Foundation's inception date as '6 January 1978'. The claim specifies '1978-01' (January 1978), which matches the month and year of the source's more precise date. The source cites https://www.macfound.org/about/our-history/ as the reference, retrieved 9 July 2017. The date formats are equivalent: '1978-01' (ISO 8601 month format) and '6 January 1978' (full date) both refer to the same month in 1978.