It's "Boy's Club Day at Disneyland". The Boy's Club had its beginnings in 1860 with several women in Hartford, Conn. Believing that boys who roamed the streets should have a positive alternative, they organized the first Club. The Boy's Club is still around, now it's called the Boys & Girl Club of America (Link).
This ticket of course was never used so there is no date stamp on the front, but the back holds a clue to its date: 624, April 1962.