A mixture of Tuesday and Wednesday, which seem more common that they are, especially during quarantine.
The opposite of thursdafrsasunmon.
Bro 2: Hey dude! You said it was thursdafrsasunmon! But it isn't. That's so messed up.
Bro 1: What? Really? Then what day is it really?
Bro 2: It's Tuesnesday!!
Bro 1: Oh how could I have been so foolish?!?