纽约当时何时以及为何成为首都？

根据美国宪法大会，1788年9月13日，纽约市曾是新形成的美国的临时首都，直到1790年。1825年伊利运河开始运作，纽约市的经济亦有所增长，成为一个经济中心。 The city emerged as the theater for a series of major battles known as the New York Campaign during the American Revolutionary War. After the Battle of Fort Washington in upper Manhattan in 1776 the city became the British military and political base of operations in North America until military occupation ended in 1783. The assembly of the Congress of the Confederation made New York City the national capital shortly thereafter; the Constitution of the United States was ratified and in 1789 the first President of the United States, George Washington, was inaugurated there; the first United States Congress assembled for the first time in 1789, and the United States Bill of Rights drafted; all at Federal Hall on Wall Street.[24] By 1790, New York City had surpassed Philadelphia as the largest city in the United States.