Two more of Albion's Premier League games have been selected for television coverage.
West Ham will now visit the Amex a day earlier, on Friday October 5, with a 8pm kick-off.
Brighton's trip to Cardiff remains on Saturday, November 10, but will get kick-off at 12.30pm.
Both matches will be shown live on Sky Sports and six of the Seagulls' opening 12 Premier League games will now be televised.
Four of Albion's matches across August and September - against Manchester United, Liverpool, Southampton and Tottenham - had already been selected for television coverage.