Jack of the United States has gone through 33 changes since 1776, the first Navy Jack was used multiple times.
The First Navy Jack was the naval jack of the United States from 1975 to 1976 and again from 2002 to 2019. 0 January 8, 1776  June 14, 1777 13 June 14, 1777  May 1, 1795 15 May 1, 1795  July 3, 1818 20 July 4, 1818  July 3, 1819 21 July 4, 1819  July 3, 1820 23 July 4, 1820  July 3, 1822 24 July 4, 1822  July 3, 1836 25 July 4, 1836  July 3, 1837 26 July 4, 1837  July 3, 1845 27 July 4, 1845  July 3, 1846 28 July 4, 1846  July 3, 1847 29 July 4, 1847  July 3, 1848 30 July 4, 1848  July 3, 1851 31 July 4, 1851  July 3, 1858 32 July 4, 1858  July 3, 1859 33 July 4, 1859  July 3, 1861 34 July 4, 1861  July 3, 1863 35 July 4, 1863  July 3, 1865 36 July 4, 1865  July 3, 1867 37 July 4, 1867  July 3, 1877 38 July 4, 1877  July 3, 1890 43 July 4, 1890  July 3, 1891 44 July 4, 1891  July 3, 1896 45 July 4, 1896  July 3, 1908 46 July 4, 1908  July 3, 1912 48 July 4, 1912  July 3, 1959 49 July 4, 1959  July 3, 1960 50 July 4, 1960  October 12, 1975 0 October 13, 1975  December 31, 1976 50 January 1, 1977  September 10, 2002 0 September 11, 2002  June 4, 2019 50 June 4, 2019  present 
