Millennium Summit

via wikipedia:

"The Millennium Summit was a meeting among many world leaders lasting three days from 6 September^[1] to 8 September 2000^[2] at the United Nations headquarters in New York City. Its purpose was to discuss the role of the United Nations at the turn of the 21st century.^[3] At this meeting, world leaders ratified the United Nations Millennium Declaration.^[4] This meeting was the largest gathering of world leaders in history as of the year 2000.^[3] It was followed by the World Summit five years later, which took place from 14 September to 16 September 2005."