The 4th Parliament was dissolved May 18, 1882 and the 5th Parliament opened February 8, 1883, for a total period of 266 days.
The 32nd Parliament, 1st Session, running from April 14, 1980 to November 30, 1983 was the longest session. It lasted 1326 days: 591 sitting days for the House of Commons and 329 sitting days for the Senate.
The 18th Parliament, 6th Session was only 1 day long and was held on January 25, 1940 at which date both the House of Commons and the Senate sat.