Season 0 of Tonight premiered on 2003-02-03.

Season 1 of Tonight premiered on 1999-04-08.

Season 2 of Tonight premiered on null.

Season 3 of Tonight premiered on 2001-03-15.

Season 4 of Tonight premiered on null.

Season 5 of Tonight premiered on null.

Season 6 of Tonight premiered on null.

Season 7 of Tonight premiered on null.

Season 8 of Tonight premiered on null.

Season 9 of Tonight premiered on null.

Season 10 of Tonight premiered on null.

Season 11 of Tonight premiered on 2009-01-05.

Season 12 of Tonight premiered on 2010-01-07.

Season 13 of Tonight premiered on 2011-01-04.

Season 14 of Tonight premiered on 2012-01-05.

Season 15 of Tonight premiered on 2013-01-03.

Season 16 of Tonight premiered on 2009-01-09.

Season 17 of Tonight premiered on 2015-03-26.

Season 18 of Tonight premiered on 2016-01-07.

Season 19 of Tonight premiered on 2017-01-12.

Season 20 of Tonight premiered on 2018-01-03.

Season 21 of Tonight premiered on 2019-01-03.

Season 22 of Tonight premiered on 2020-01-02.

Season 23 of Tonight premiered on 2021-01-07.

Season 24 of Tonight premiered on 2022-01-06.

Season 25 of Tonight premiered on 2023-01-05.

Season 26 of Tonight premiered on 2024-01-04.

Season 27 of Tonight premiered on 2025-01-09.