More surprisingly, perhaps, Hawaii, which in 1959 became the 50th state to join the United States, also includes the union jack. This dates back to 1793, when British captain George Vancouver presented one (without the diagonal red cross of St Patrick, as this preceded the 1801 Act of Union between Great Britain and Ireland) to King Kamehameha I. The union jack flew as Hawaii's sole flag until 1816, when red, white and blue stripes were added. It has remained a part of the flag."It might seem strange, as Hawaii was never British," says Graham Bartram, chief vexillologist at the Flag Institute, "but it works as a symbol of friendship. What's interesting is that, when the union jack changed in 1801, so did the flag of Hawaii, even though there wasn't an official connection."