A term used by the Harding-Coolidge presidential campaign of 1920, it denotes a desire to return to the "good old days" of pre-World War I America.

"A return to normalcy" was U.S. Presidential candidate Warren Harding’s campaign promise in the election of 1920.  Although the word was a neologism as well as a malapropism (see normality), coined by Harding, the implied concept apparently encapsulated what Americans wanted, since he was elected president over his Democratic opponent James Cox.

expectedness as a consequence of being usual or regular or common

The quality, state, or fact of being normal; the normal situation or condition; as, the point of normalcy.

being within certain limits that define the range of normal functioning