On March 13th, like Mar10 and Mar13 day, it spells out C4ll13 in reference to the Splatoon character named “Callie”.
On this day, you must play Splatoon 2 if you own it, no questions asked.
Glorified Cultist of Splatoon: Ayo, it’s April 13th!
Sane Individual: What the fuck are you talking about
Glorified Cultist of Splatoon: We are playing Splatoon 2