1st to 9th Congresses (1789–1807)
Sunday sessions are marked in bold.
| Congress and Year | 1st Session | 2nd session | 3rd Session* |
|---|---|---|---|
| 1st (1789-1791) | March 7, 1789 | January 9, 1790 | December 11, 1790 |
| March 14, 1789 | March 13, 1790 | January 22, 1791 | |
| March 21, 1789 | April 3, 1790 | February 5, 1791 | |
| March 28, 1789 | April 10, 1790 | February 12, 1791 | |
| April 4, 1789 | July 10, 1790 | February 19, 1791 | |
| April 11, 1789 | July 17, 1790 | February 26, 1791 | |
| April 18, 1789 | July 24, 1790 | ||
| April 25, 1789 | August 7, 1790 | ||
| May 9, 1789 | |||
| May 16, 1789 | |||
| June 13, 1789 | |||
| June 27, 1789 | |||
| July 11, 1789 | |||
| August 8, 1789 | |||
| August 15, 1789 | |||
| August 22, 1789 | |||
| August 29, 1789 | |||
| September 5, 1789 | |||
| September 12, 1789 | |||
| September 19, 1789 | |||
| September 26, 1789 | |||
| 2nd (1791-1793) | February 25, 1792 | November 10, 1792 | |
| March 3, 1792 | January 5, 1793 | ||
| March 10, 1792 | January 12, 1793 | ||
| March 17, 1792 | January 26, 1793 | ||
| March 24, 1792 | February 9, 1793 | ||
| March 31, 1792 | February 16, 1793 | ||
| April 7, 1792 | February 23, 1793 | ||
| April 21, 1792 | March 2, 1793 | ||
| April 28, 1792 | |||
| May 5, 1792 | |||
| 3rd (1793-1795) | December 7, 1793 | November 29, 1794 | |
| January 25, 1794 | February 14, 1795 | ||
| April 26, 1794 | February 21, 1795 | ||
| May 10, 1794 | February 28, 1795 | ||
| May 17, 1794 | |||
| May 24, 1794 | |||
| May 31, 1794 | |||
| June 7, 1794 | |||
| 4th (1795-1797) | April 9, 1796 | February 11, 1797 | |
| April 16, 1796 | February 18, 1797 | ||
| April 30, 1796 | February 25, 179 | ||
| May 7, 1796 | |||
| May 14, 1796 | |||
| May 21, 1796 | |||
| May 28, 1796 | |||
| 5th (1797-1799) | May 27, 1797 | May 5, 1798 | December 8, 1798 |
| June 3, 1797 | May 19, 1798 | February 9, 1799 | |
| June 10, 1797 | May 26, 1798 | February 16, 1799 | |
| June 17, 1797 | June 9, 1798 | February 23, 1799 | |
| June 24, 1797 | June 16, 1798 | March 2, 1799 | |
| July 1, 1797 | June 23, 1798 | March 3, 1799 | |
| July 8, 1797 | June 30, 1798 | ||
| July 7, 1798 | |||
| July 14, 1798 | |||
| 6th (1799-1801) | March 1, 1800 | November 22, 1800 | |
| March 8, 1800 | February 14, 1801 | ||
| April 12, 1800 | February 21, 1801 | ||
| April 26, 1800 | February 28, 1801 | ||
| May 3, 1800 | |||
| May 10, 1800 | |||
| 7th (1801-1803) | February 27, 1802 | December 11, 1802 | |
| March 13, 1802 | February 12, 1803 | ||
| March 27, 1802 | February 19, 1803 | ||
| April 3, 1802 | February 26, 1803 | ||
| April 17, 1802 | |||
| April 24, 1802 | |||
| May 1, 1802 | |||
| 8th (1803-1805) | October 22, 1803 | January 12, 1805 | |
| October 29, 1803 | February 2, 1805 | ||
| January 7, 1804 | February 9, 1805 | ||
| February 18, 1804 | February 16, 1805 | ||
| March 3, 1804 | February 23, 1805 | ||
| March 10, 1804 | March 2, 1805 | ||
| March 17, 1804 | |||
| March 24, 1804 | |||
| 9th (1805-1807) | January 11, 1806 | December 6, 1806 | |
| March 8, 1806 | January 31, 1807 | ||
| March 22, 1806 | February 7, 1807 | ||
| March 29, 1806 | February 21, 1807 | ||
| April 5, 1806 | February 28, 1807 | ||
| April 12, 1806 | |||
| April 19, 1806 |
* 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.