An extraordinary session of the National Diet is necessary in early October to elect a new prime minister. Depending on when that Diet session closes and if and when the new cabinet dissolves the House of Representatives, possible election dates range from late October to 14 November without dissolution or up to 28 November with dissolution. If the election is held in late October or November, the 2021 election would be the first in post-war history to be held not only at, but after the actual end of term (21 October).[6][7]