We don't know if it's going to be the 23rd. It's three days before the 26th or three days before the last supply day has been designated. We don't know when the last day would be designated.
Evidence of meeting #1 for National Defence in the 43rd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was minutes.
A recording is available from Parliament.