70th to 79th Congresses (1927–1947)

Sunday sessions are marked in bold.

Congress and Year1st Session2nd session 3rd Session*
70th (1927-1929) December 10, 1927 December 15, 1928  
  January 7, 1928 December 22, 1928  
  March 3, 1928 January 5, 1929  
  March 10, 1928 February 2, 1929  
  March 17, 1928 February 9, 1929 
  March 24, 1928February 16, 1929  
  March 31, 1928 February 23, 1929  
  April 14, 1928 March 2, 1929  
 April 15, 1928  
  April 21, 1928   
  April 28, 1928   
 April 29, 1928  
  May 5, 1928   
 May 6, 1928  
 May 12, 1928  
 May 13, 1928  
 May 19, 1928   
 May 20, 1928  
  May 26, 1928   
71st (1929-1931) April 20, 1929 December 7, 1929 December 20, 1930
  May 11, 1929 December 14, 1929 January 10, 1931
  May 25, 1929 December 21, 1929 January 17, 1931
  June 8, 1929 January 11, 1930 January 24, 1931
   January 18, 1930 January 31, 1931
   January 25, 1930 February 7, 1931
   February 1, 1930 February 14, 1931
   February 8, 1930 February 21, 1931
   February 15, 1930 February 28, 1931
  February 22, 1930  
   March 1, 1930  
   May 3, 1930 
   May 24, 1930  
  June 14, 1930  
  June 21, 1930  
   June 28, 1930 
72nd (1931-1933) December 19, 1931 December 10, 1932  
  January 9, 1932 December 17, 1932  
  January 23, 1932 January 14, 1933  
  February 13, 1932 January 21, 1933  
  February 20, 1932 January 28, 1933  
  February 27, 1932 February 4, 1933  
  March 5, 1932 February 11, 1933  
  March 12, 1932 February 18, 1933  
  March 19, 1932 February 25, 1933  
  March 26, 1932   
  April 9, 1932   
  April 23, 1932   
  April 30, 1932   
  May 7, 1932   
  May 14, 1932   
  May 21, 1932   
  June 4, 1932   
  June 11, 1932   
  June 18, 1932   
  July 16, 1932   
73rd (1933-1935) March 11, 1933 January 20, 1934  
  April 22, 1933 February 10, 1934  
  May 20, 1933 February 24, 1934  
  May 27, 1933 March 3, 1934  
  June 3, 1933 March 10, 1934  
  June 10, 1933 March 17, 1934  
   March 24, 1934  
   April 21, 1934  
  May 20, 1934 
   June 2, 1934  
   June 9, 1934  
74th (1935-1937) March 9, 1935 February 22, 1936  
  April 6, 1935   
  April 13, 1935   
  May 4, 1935   
  June 15, 1935   
  June 29, 1935   
 August 3, 1935   
  August 17, 1935   
75th (1937-1939)   January 5, 1938
    April 2, 1938
    May 7, 1938
    June 11, 1938
76th (1939-1941) March 4, 1939   June 22, 1940
  March 25, 1939   September 7, 1940
  June 10, 1939   September 14, 1940
  July 1, 1939   
  July 22, 1939   
  July 29, 1939   
  August 5, 1939   
77th (1941-1943) February 8, 1941 February 28, 1942  
  June 28, 1941 March 7, 1942  
  December 20, 1941 March 28, 1942  
   June 27, 1942  
   July 18, 1942  
   October 17, 1942  
78th (1943-1945) March 27, 1943 April 1, 1944  
  April 17, 1943 June 3, 1944  
  June 19, 1943 June 10, 1944  
  July 3, 1943 June 17, 1944  
  December 18, 1943 December 16, 1944  
79th (1945-1947) January 6, 1945 April 13, 1946  
  March 24, 1945 May 25, 1946  
  April 14, 1945 June 29, 1946  
  May 26, 1945 July 13, 1946 
  June 23, 1945 July 20, 1946  
  June 30, 1945 July 27, 1946  
  July 21, 1945   

* 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.