Last Tuesdayism 

Last Tuesdayism
(np) 1. The assertion that all existence sprang into being this past Tuesday, with all memories of sentient beings created in situ. The Universe, and everything in it, was created last Tuesday, along with our (false) memories of everything that happened prior to that. Another common belief, known as Last Thursdayism, is considered wrong

According to Last Tuesdayism, we might not even exist yet, as last Tuesday could possibly be this upcoming Tuesday.

Last Tuesdayism by qwertyology June 26, 2018

Last Thursdayism 

(np) 1. The assertion that all existence sprang into being this past Thursday, with all memories of sentient beings created in situ. The Universe, and everything in it, was created last Thursday, along with our (false) memories of everything that happened prior to that. Another common belief, known as Last Tuesdayism, is considered wrong.

Q: "What is the evidence for Last Thursdayism?"
A: "There's lots of pieces of evidence that prove that Last Thursdayism is true but we can't go into that right now."

Last Thursdayism by Anonymous November 6, 2002