3/1 is Original T-Shirts Day!(Hereinafter called "Ori-T")Buy one and I'll show you what's inside.I'm only joking though!A commemorative day established by the Japan Ori-T Association with the goal of providing people the means to create their own one-of-a-kind Ori-T!
The group chose this date because of their three core values they call their "Three Ms" which are Message, Memorial, and Mind, hence the month of March. And the desire to make a one-of-a-kind t-shirt you won't find anywhere else in the world, hence the first day of March.