40th to 49th Congresses (1867–1887)

Sunday sessions are marked in bold. 

Congress and Year1st Session2nd 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, 18711 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   

Footnotes

*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.

1Opening day of the 42nd Congress.