Last Thursdayism

Proper noun

 * 1)  The proposition that the universe began to exist last Thursday, with the appearance of age and history.

Usage notes
Used to respond to claims of young-earth creationism that the Earth was created recently: in the same way, the world might have begun last Thursday with all the characteristics we observe today, with no way to disprove this.

Translations

 * Esperanto: pasintĵaŭdismo
 * Finnish: