Something going on June 23-24?

[mom2elal]

I was looking at the blockout calendar, trying to pick our dates in June, and I noticed that the Southern CA passport (the one they're not selling anymore) is blocked June 23 and 24, the only Wed. and Thurs. they are blocked that month. Does anyone know why those particular dates would be blocked? Is there some special event going on or something? Thanks!