Feliz Jueves refers to the Irony Server Tradition of sending the video, or gif of "Feliz Jueves" by the staff of the server, or users every Thursday.

Feliz Jueves, "Happy Thursday"
Alternative

The contents of the viral Feliz Jueves video consist of many Neon Genesis Evangelion characters wishing the viewers a happy Thursday. The earliest mention of The Feliz Jueves Circlejerk in an Irony Server dates back to early 2020. Aligning itself with the initial beginning of the popularity of the Feliz Jueves Meme in mainstream media. Some servers such as Whenthe have added special roles that anyone can choose in order to be pinged for a happy Thursday with the video every Thursday.