40th-49th Congresses
Sunday sessions are marked in bold.
| Congress and Year | 1st Session | 2nd session | 3rd Session* |
|---|---|---|---|
| 40th (1867-1869) | March 23, 1867 | December 7, 1867 | January 23, 1869 |
| July 13, 1867 | January 11, 1868 | January 30, 1869 | |
| July 20, 1867 | January 18, 1868 | February 6, 1869 | |
| November 30, 1867 | January 25, 1868 | February 13, 1869 | |
| February 1, 1868 | February 20, 1869 | ||
| February 8, 1868 | February 27, 1869 | ||
| February 15, 1868 | |||
| February 22, 1868 | |||
| February 29, 1868 | |||
| March 7, 1868 | |||
| March 14, 1868 | |||
| March 21, 1868 | |||
| March 28, 1868 | |||
| April 4, 1868 | |||
| April 18, 1868 | |||
| April 25, 1868 | |||
| May 2, 1868 | |||
| May 16, 1868 | |||
| May 23, 1868 | |||
| May 30, 1868 | |||
| June 6, 1868 | |||
| June 13, 1868 | |||
| June 20, 1868 | |||
| June 27, 1868 | |||
| July 11, 1868 | |||
| July 18, 1868 | |||
| July 25, 1868 | |||
| 41st (1869-1871) | April 3, 1869 | December 11, 1869 | January 7, 1871 |
| January 22, 1870 | January 14, 1871 | ||
| January 29, 1870 | January 21, 1871 | ||
| February 5, 1870 | January 28, 1871 | ||
| February 12, 1870 | February 4, 1871 | ||
| February 19, 1870 | February 11, 1871 | ||
| March 5, 1870 | February 18, 1871 | ||
| March 12, 1870 | February 25, 1871 | ||
| March 19, 1870 | |||
| March 26, 1870 | |||
| April 2, 1870 | |||
| April 9, 1870 | |||
| April 23, 1870 | |||
| April 30, 1870 | |||
| May 21, 1870 | |||
| May 28, 1870 | |||
| June 4, 1870 | |||
| June 11, 1870 | |||
| June 18, 1870 | |||
| June 25, 1870 | |||
| July 2, 1870 | |||
| July 9, 1870 | |||
| 42nd (1871-1873) | March 4, 1871 | January 27, 1872 | December 14, 1872 |
| April 1, 1871 | February 3, 1872 | January 11, 1873 | |
| April 15, 1871 | February 10, 1872 | January 18, 1873 | |
| February 17, 1872 | January 25, 1873 | ||
| February 24, 1872 | February 1, 1873 | ||
| March 2, 1872 | February 8, 1873 | ||
| March 16, 1872 | February 15, 1873 | ||
| March 23, 1872 | February 22, 1873 | ||
| April 6, 1872 | March 1, 1873 | ||
| April 13, 1872 | |||
| April 27, 1872 | |||
| May 4, 1872 | |||
| May 11, 1872 | |||
| May 18, 1872 | |||
| June 1, 1872 | |||
| June 8, 1872 | |||
| 43rd (1873-1875) | January 10, 1874 | January 30, 1875 | |
| January 17, 1874 | February 6, 1875 | ||
| January 24, 1874 | February 13, 1875 | ||
| January 31, 1874 | February 20, 1875 | ||
| February 7, 1874 | February 27, 1875 | ||
| February 14, 1874 | |||
| February 21, 1874 | |||
| February 28, 1874 | |||
| March 7, 1874 | |||
| March 14, 1874 | |||
| March 21, 1874 | |||
| March 28, 1874 | |||
| April 4, 1874 | |||
| April 11, 1874 | |||
| April 18, 1874 | |||
| April 25, 1874 | |||
| May 2, 1874 | |||
| May 9, 1874 | |||
| May 16, 1874 | |||
| May 23, 1874 | |||
| June 6, 1874 | |||
| June 13, 1874 | |||
| June 20, 1874 | |||
| 44th (1875-1877) | January 22, 1876 | December 16, 1876 | |
| January 29, 1876 | December 23, 1876 | ||
| February 19, 1876 | December 30, 1876 | ||
| February 26, 1876 | January 6, 1877 | ||
| March 4, 1876 | January 20, 1877 | ||
| March 11, 1876 | January 27, 1877 | ||
| April 1, 1876 | February 3, 1877 | ||
| April 8, 1876 | February 10, 1877 | ||
| April 15, 1876 | February 17, 1877 | ||
| April 22, 1876 | February 24, 1877 | ||
| April 29, 1876 | March 3, 1877 | ||
| May 6, 1876 | |||
| May 13, 1876 | |||
| May 20, 1876 | |||
| May 27, 1876 | |||
| June 3, 1876 | |||
| June 10, 1876 | |||
| June 17, 1876 | |||
| June 24, 1876 | |||
| July 1, 1876 | |||
| July 8, 1876 | |||
| July 15, 1876 | |||
| July 29, 1876 | |||
| August 5, 1876 | |||
| August 12, 1876 | |||
| 45th (1877-1879) | October 20, 1877 | December 15, 1877 | December 14, 1878 |
| November 3, 1877 | January 26, 1878 | January 11, 1879 | |
| November 10, 1877 | February 9, 1878 | January 18, 1879 | |
| November 17, 1877 | March 9, 1878 | January 25, 1879 | |
| December 1, 1877 | March 16, 1878 | February 1, 1879 | |
| April 13, 1878 | February 8, 1879 | ||
| April 20, 1878 | February 15, 1879 | ||
| April 27, 1878 | February 22, 1879 | ||
| May 4, 1878 | March 1, 1879 | ||
| May 11, 1878 | |||
| May 18, 1878 | |||
| May 25, 1878 | |||
| June 1, 1878 | |||
| June 8, 1878 | |||
| June 15, 1878 | |||
| 46th (1879-1881) | March 29, 1879 | January 31, 1880 | December 18, 1880 |
| April 5, 1879 | February 14, 1880 | January 8, 1881 | |
| April 12, 1879 | March 20, 1880 | January 15, 1881 | |
| April 19, 1879 | March 27, 1880 | January 22, 1881 | |
| April 26, 1879 | April 3, 1880 | January 29, 1881 | |
| May 3, 1879 | April 10, 1880 | February 5, 1881 | |
| May 10, 1879 | April 17, 1880 | February 12, 1881 | |
| May 17, 1879 | April 24, 1880 | February 19, 1881 | |
| May 24, 1879 | May 1, 1880 | February 26, 1881 | |
| June 7, 1879 | May 8, 1880 | ||
| June 14, 1879 | May 15, 1880 | ||
| June 21, 1879 | May 22, 1880 | ||
| June 28, 1879 | June 5, 1880 | ||
| June 12, 1880 | |||
| 47th (1881-1883) | February 4, 1882 | January 6, 1883 | |
| February 18, 1882 | January 13, 1883 | ||
| February 25, 1882 | January 20, 1883 | ||
| March 4, 1882 | January 27, 1883 | ||
| March 18, 1882 | February 3, 1883 | ||
| April 1, 1882 | February 10, 1883 | ||
| April 8, 1882 | February 17, 1883 | ||
| April 15, 1882 | February 24, 1883 | ||
| April 22, 1882 | March 3, 1883 | ||
| April 29, 1882 | |||
| May 6, 1882 | |||
| May 13, 1882 | |||
| May 20, 1882 | |||
| May 27, 1882 | |||
| June 3, 1882 | |||
| June 10, 1882 | |||
| June 17, 1882 | |||
| June 24, 1882 | |||
| July 1, 1882 | |||
| July 8, 1882 | |||
| July 15, 1882 | |||
| July 22, 1882 | |||
| August 5, 1882 | |||
| December 9, 1882 | |||
| December 23, 1882 | |||
| 48th (1883-1885) | January 19, 1884 | December 20, 1884 | |
| January 26, 1884 | January 10, 1885 | ||
| February 23, 1884 | January 17, 1885 | ||
| March 1, 1884 | January 24, 1885 | ||
| March 8, 1884 | January 31, 1885 | ||
| March 15, 1884 | February 7, 1885 | ||
| March 22, 1884 | February 21, 1885 | ||
| April 5, 1884 | February 28, 1885 | ||
| April 12, 1884 | |||
| April 19, 1884 | |||
| April 26, 1884 | |||
| May 3, 1884 | |||
| May 17, 1884 | |||
| May 24, 1884 | |||
| May 31, 1884 | |||
| June 7, 1884 | |||
| June 14, 1884 | |||
| June 21, 1884 | |||
| June 28, 1884 | |||
| July 5, 1884 | |||
| 49th (1885-1887) | December 12, 1885 | December 11, 1886 | |
| December 19, 1885 | December 18, 1886 | ||
| February 13, 1886 | January 8, 1887 | ||
| February 27, 1886 | January 15, 1887 | ||
| March 6, 1886 | January 22, 1887 | ||
| March 13, 1886 | January 29, 1887 | ||
| March 20, 1886 | February 5, 1887 | ||
| March 27, 1886 | February 12, 1887 | ||
| April 3, 1886 | February 19, 1887 | ||
| April 10, 1886 | February 26, 1887 | ||
| April 17, 1886 | |||
| April 24, 1886 | |||
| May 1, 1886 | |||
| May 8, 1886 | |||
| May 15, 1886 | |||
| May 22, 1886 | |||
| May 29, 1886 | |||
| June 5, 1886 | |||
| June 12, 1886 | |||
| June 19, 1886 | |||
| June 26, 1886 | |||
| July 3, 1886 | |||
| July 10, 1886 | |||
| July 17, 1886 | |||
| July 24, 1886 | |||
| July 31, 1886 |
* Congressional leaders discontinued the use of third sessions by the end of the 1930s. The ratification of the 20th Amendment in 1933, provided for Congress to assemble on or about the third day of January rather than the traditional March start date. Third sessions, which generally had run from December to March, no longer were necessary.