What is o-tanjoubi?

O-tanjoubi (お誕生日) is a Japanese term that means "birthday." It is a way to celebrate the anniversary of someone's birth, often marked with parties, gifts, and special meals. In Japan, it's common to say "o-tanjoubi omedetou" (お誕生日おめでとう), which translates to "Happy Birthday." The celebration can include traditional Japanese customs, as well as modern practices influenced by Western culture.