Editing 1955 (section)

===October===
{{main|October 1955}}
* [[October 2]] – ''[[Alfred Hitchcock Presents]]'' debuts on the [[CBS]] TV network in the United States.
* [[October 3]] – ''[[The Mickey Mouse Club]]'' debuts on the [[American Broadcasting Company|ABC-TV]] network in the United States.
* [[October 4]] – The Reverend [[Sun Myung Moon]] is released from prison in [[Seoul]], South Korea.
* [[October 5]] – [[Disneyland Hotel (California)|Disneyland Hotel]] opens to the public in [[Anaheim, California]].
* [[October 11]] – 70-mm film for projection is introduced, with the theatrical release of Rodgers and Hammerstein's musical film, ''[[Oklahoma! (film)|Oklahoma!]]''.
* [[October 14]] – The [[Organization of Central American States]] secretariat is inaugurated.
* [[October 20]] – [[Disc jockey]] [[Bill Randle]] of [[WERE]] ([[Cleveland]]) is the key presenter of a concert at [[Brooklyn High School (Ohio)]], featuring [[Pat Boone]] and [[Bill Haley & His Comets]], and opening with [[Elvis Presley]] (Elvis's first filmed performance), for a documentary on Randle titled ''[[The Pied Piper of Cleveland]]''.
* [[October 26]]
** After the last [[Allies of World War II|Allied]] troops have left [[Austria]], and following the provisions of the [[Austrian Independence Treaty]], the country declares its [[Neutral country|permanent neutrality]].
** [[Ngo Dinh Diem|Ngô Đình Diệm]] proclaims [[Vietnam]] to be a republic, with himself as its President (following the [[1955 State of Vietnam referendum|State of Vietnam referendum]] on [[October 23]]), and forms the [[Army of the Republic of Vietnam]].
* [[October 27]] – The film ''[[Rebel Without a Cause]]'', starring [[James Dean]], is released in the United States.
* [[October 29]] – [[Italian battleship Giulio Cesare#Novorossiysk|Soviet battleship ''Novorossiysk'']] explodes at moorings in [[Sevastopol]] Bay, killing 608 (the [[Soviet Union]]'s worst naval disaster to date).