That question is impossible to answer. There are thousands of TV stations around the world. On any one of them, there would be many programmes in one day. So it would be impossible to list all of the TV Programmes on all of the channels around the world that were shown on the 23rd of August 1998.
MTV Revue with Ice Cube - 1998 - TV was released on: USA: 23 August 1998
MTV Revue with Ice Cube - 1998 TV was released on: USA: 23 August 1998
Brink - 1998 TV was released on: USA: 29 August 1998 Sweden: 23 April 2005 Finland: 16 July 2005
August 23, 1998 and May 16, 1999.
Only Love - 1998 TV was released on: USA: 10 May 1998 Hungary: 4 October 2005 (re-release) Japan: 23 August 2006 (internet) Belgium: 8 August 2009
The Con - 1998 TV was released on: USA: 4 March 1998 Germany: 20 July 1998 (video premiere) Iceland: 4 August 1998 (video premiere) Finland: 12 August 1998 (video premiere) Japan: 23 September 1998 (video premiere) UK: 4 July 2002
Legacy - 1998 I was released on: USA: 9 October 1998 Philippines: 4 August 1999 (Davao) Italy: 23 January 2004 (TV premiere)
A Season in Purgatory - 1996 - TV was released on: USA: 5 May 1996 Portugal: 23 August 1998
TekWar - 1994 TV was released on: USA: 23 January 1994 Netherlands: 9 August 1997 France: 29 May 1998
The 70th Annual Academy Awards - 1998 TV was released on: Argentina: 23 March 1998 USA: 23 March 1998
Summerslam - 1998 TV was released on: USA: 30 August 1998
Tarzan and the Lost City - 1998 was released on: USA: 24 April 1998 Australia: 21 May 1998 Singapore: 21 May 1998 France: 24 June 1998 Belgium: 8 July 1998 Mexico: 7 August 1998 Poland: 7 August 1998 Italy: 21 August 1998 Turkey: 6 November 1998 Kuwait: 11 November 1998 Indonesia: 13 March 1999 (Jakarta) Spain: 23 July 1999 Iceland: 6 August 1999 Portugal: 17 February 2000 (video premiere) Finland: 24 December 2002 (TV premiere) Sweden: 7 January 2007 (TV premiere)