As mentioned in their anniversary press release, they're doing a weeklong event the week of June 20 tying in to ABC's premieres of Celebrity Family Feud and Match Game on June 26.
For the whole week, the 8PM slot is Feud's TV's All Time Favorites week from 1983, the 8:30PM slot is Feud's Hollywood Walk of Fame week from 1985, and the 9PM hour they'll run episodes of Match Game 73 (with dates of 7/2/73-7/16/73). I think that means they'll be skipping an episode, but I can't tell which one.
The Feud and Match Game 73 episodes repeat in a daylong marathon on Saturday, June 25.