From the official website:

“This year we celebrate 400 years of enduring friendship between the Netherlands and the United States. Four hundred years ago, a Dutch ship called the Half Moon guided to the shores of what is now New York City with Captain Henry Hudson at the helm. This lead to the establishment of New Amsterdam and the New Netherland colony. Some 167 years later, in 1776, the Dutch were the first to salute the flag of the United States of America. NY400 celebrates the free spirit, openness, entrepreneurship and tolerance of those Dutch-American pioneers, and their continued relevance today and beyond.”