http://tv.groups.yahoo.com/group/Old_Disney_Channel_Memorial/

Disney Channel's first broadcasting day occurred on April 18, 1983. At
the inception, the Disney Channel only aired 18 hours a day from 7:00
a.m. to 1:00 a.m.; 24-hour programming would begin in December 1986.
The channel's programming on the first day on the air was an episode
of the 1950s-era Mickey Mouse Club. The first produced Disney Channel
original series shown on the network included Good Morning, Mickey!,
Donald Duck Presents, Contraption, Dumbo's Circus, You and Me Kid,
EPCOT Magazine and Welcome to Pooh Corner. The original late night
schedule featured reruns of the classic The Adventures of Ozzie and
Harriet.