Princess Peach dressed in traditional Japanese clothing, seen in an official calendar released by Nintendo: Club Nintendo Original Calendar 2015 (and 2016). This calendar was given as a reward for Club Nintendo members. This is the second time Peach has ever been depicted in a kimono in official promotional art.
She's in a pink Kimono that is covered in flower patterns, wears a Hirabitai on her head and carries a yellow Hand Fan. In the official art she is seen sitting on a Hinadan with bonbori at both of her sides.