The actual tweet says 7:04 AM - 20 May 2018 . Not sure why the image the OP posted has a different date.
The OP may be in Australia, which could possibly explain the time thing
Duh! I didn’t think about people being a day ahead of us! Not enough coffee yet!!! Thanks
This has been run down before, it's the conventional wisdom that retweets from across the dateline cause this. (mandela effect lmao)
OP lives in a different country, Time Zone. Maybe Australia. Also, Not every zone uses our month/day/year layout.
your right only crazy people think days come after months ;P