A day a month for DIY

The 21st of every month in Japan is My DIY day (mydiy [sic]) myDIYの日. It is an anniversary created by Leopalace21, the Tokyo‑based company known for developing and managing apartments, condominiums, and resort facilities.

The idea grew out of the company’s service called myDIY, which allows tenants to personalize their rental rooms by choosing wallpaper for free or adding small touches like paint, shelves, and other simple modifications. The goal is to promote a new style of rental living where residents can enjoy expressing themselves without the usual restrictions of apartment life.

The date was chosen from the “21” in the company name, making it easy to remember and allowing the campaign to run throughout the year. Leopalace21 also notes that “2” and “1” together symbolize a moment of connection between the room and the resident, reinforcing the idea of creating a space that feels personal and welcoming.

The anniversary was officially registered with the Japan Anniversary Association in 2016, though the registration has since ended. But even still, the anniversary has remained popular and prompts people to get creative at least once a month.