Nanakusa-no-sekku is a special day in Japan where people celebrate the change of seasons from winter to spring. It usually falls on the 7th of January every year.
On this day, people in Japan make a special dish called "nanakusa-gayu." This dish is made by boiling seven different types of green vegetables together with rice porridge. The seven vegetables used in this dish are water dropwort, chickweed, shepherd's purse, nipplewort, turnip, daikon, and radish. These vegetables are known to be very healthy and help people to recover from the cold winter months.
To celebrate this day, people in Japan also decorate their homes and display an arrangement of seven different flowers, called "nana-kusa-no-hana." These flowers are usually picked from the wild and include things like dandelions, Japanese parsley, and shepherd's purse. The flowers are believed to have special powers to ward off evil and bring good luck to people's homes.
Overall, nanakusa-no-sekku is a special day that celebrates the start of spring and encourages people to take care of their health by eating healthy vegetables and being surrounded by positivity and good luck.