The table below was derived from information in Cobbet's Parliamentary History (for sessions until 1803) and Parliamentary Debates from the Year 1803 to the Present Time for sessions afterwards. In most cases, the dates included are the dates of the King's opening and closing speeches. When the King no longer opened and closed Parliament himself, I used what appeared to be the opening and closing dates in the text for the relevant volumes. I welcome any corrections.
| Session | Opened | Closed |
|---|---|---|
| First Session of Fourteenth Parliament |
November 30, 1774 | May 26, 1775 |
| Second Session of Fourteenth Parliament |
October 26, 1775 | May 23, 1776 |
| Third Session of Fourteenth Parliament |
October 31, 1776 | June 6, 1777 |
| Fourth Session of Fourteenth Parliament |
November 18th, 1777 | June 3, 1778 |
| Fifth Session of Fourteenth Parliament |
November 26, 1778 | July 3, 1779 |
| Sixth Session of Fourteenth Parliament |
November 25, 1779 | July 8, 1780 |
| First Session of Fifteenth Parliament |
November 1, 1780 | July 18, 1781 |
| Second Session of Fifteenth Parliament |
November 27, 1781 | July 11, 1782 |
| Third Session of Fifteenth Parliament |
December 5, 1782 | July 16, 1783 |
| Fourth Session of Fifteenth Parliament |
November 11, 1783 | March 24, 1784 |
| First Session of Sixteenth Parliament |
May 19, 1784 | August 20, 1784 |
| Second Session of Sixteenth Parliament |
January 25, 1785 | July 2, 1785 |
| Third Session of Sixteenth Parliament |
January 24, 1786 | July 11, 1786 |
| Fourth Session of Sixteenth Parliament |
January 23, 1787 | May 30, 1787 |
| Fifth Session of Sixteenth Parliament |
November 27, 1787 | July 11, 1788 |
| Sixth Session of Sixteenth Parliament |
February 3, 1788 | August 11, 1789 |
| Seventh Session of Sixteenth Parliament |
January 21, 1790 | June 10, 1790 |
| First Session of Seventeenth Parliament |
November 25, 1790 | June 10, 1791 |
| Second Session of Seventeenth Parliament |
January 31, 1792 | June 15, 1792 |
| Third Session of Seventeenth Parliament |
December 13, 1792 | June 21, 1793 |
| Fourth Session of Seventeenth Parliament |
January 21, 1794 | July 11, 1794 |
| Fifth Session of Seventeenth Parliament |
December 30, 1794 | June 27, 1795 |
| Sixth Session of Seventeenth Parliament |
October 29, 1795 | May 19, 1796 |
| First Session of Eighteenth Parliament |
October 6, 1796 | July 20, 1797 |
| Second Session of Eighteenth Parliament |
November 2, 1797 | June 29, 1798 |
| Third Session of Eighteenth Parliament |
November 20, 1798 | July 12, 1799 |
| Fourth Session of Eighteenth Parliament |
September 24, 1799 | July 29, 1800 |
| Fifth Session of Eighteenth Parliament |
November 11, 1800 | December 31, 1800 |
| First Session of First Parliament (UK) |
February 2, 1801 | July 2, 1801 |
| Second Session of First Parliament (UK) |
October 29, 1801 | June 28, 1802 |
| First Session of Second Parliament (UK) |
November 29, 1802 | August 12, 1803 |
| Second Session of Second Parliament (UK) |
November 22, 1803 | July 31, 1804 |
| Third Session of Second Parliament (UK) |
January 15, 1805 | May 14, 1805 |
| Fourth Session of Second Parliament (UK) |
January 21, 1806 | May 6, 1806 |
| First Session of Third Parliament (UK) |
December 15, 1806 | April 27, 1807 |
| First Session of Fourth Parliament (UK) |
June 22, 1807 | August 14, 1807 |
| Second Session of Fourth Parliament (UK) |
January 21, 1808 | July 4, 1808 |
| Third Session of Fourth Parliament (UK) |
January 19, 1809 | June 21, 1809 |
| Fourth Session of Fourth Parliament (UK) |
January 23, 1810 | May 17, 1810 |