The first round of voting in Finnish presidential elections always takes place on the third Sunday of January, in this case 15 January 2006. As no candidate received more than half of the vote, a second round was held on 29 January between the two highest placed candidates from the first round, Tarja Halonen and Sauli Niinistö. Tarja Halonen, the incumbent, won the final round by 3.6 percentage points. The newly elected president formally took office for her second term on 1 March, and would have done so on 1 February, had no run-off been necessary (Constitution 55 §).