A day when people pause to think if that thing they read on the internet is true or not. A skill sorely lacking during the other 364 days of the year.
Daily Mail teases readers with fact-based article for April Fools https://newsthump.com/2021/04/01/daily-mail-teases-readers-with-fact-based-article-for-april-fools/
How about the Volkswagon / Voltswagon story ( or hoax ) ? It seems that even VAG themselves aren't sure about it .....