"x⋅2x⋅3x" is a TikTok video posted by capwithoutacountry on 14 July 2021.
Transcript[]
"Just wanted to wish all of my fellow math nerds a happy x⋅2x⋅3x Day, given that today is July 14th of 2021, or 7/14/21. This is a triannual holiday that occurs twelve times over a 33-year span each century; the last time it happened was June 12th of 2018, and the next time it will happen will be August 16th of 2024."