It seems it will last all month of April 
MangaDex Forums
gimme_yuri_plz
panzerkampfwagyu
A̶h̸ ̴c̷l̸a̸s̶s̷i̸c̵a̷l̶ ̶C̸l̸a̴s̶s̵i̸c̷,̷ ̸b̵u̸t̴ ̶h̸a̶v̴e̴ ̸y̵o̵u̷ ̵c̶o̴n̷s̵i̶d̷e̴r̸e̵d̸.̴.̷.̶
̸M̴I̵R̸R̸O̷R̸E̸?̴
̸M̴I̵R̸R̸O̷R̸E̸?̴
panzerkampfwagyu
̷N̵o̷w̴ ̶t̶h̷e̷ ̸g̸a̵y̵ ̴s̵p̴e̸a̸k̴e̸r̴ ̸h̸a̵p̵p̵e̵n̵s̵ ̷t̷o̴ ̶b̷e̴ ̸y̷o̸u̷~̷