Definitely Not Rick and Morty:Timeline
From Game Detectives Wiki
April 1st, 2017 (April Fool's Day)
The Airing
After nearly exactly one and a half years, Adult Swim surprise aired the season 3 premiere of Rick and Morty on a loop on their website.
The Tweet
At 8:02PM AOE the R&M Twitter account posted this tweet claiming that 'Rick is free'.