Setsugetsuka (or pronounced as Yuki Tsuki Hana (Snow, the Moon and Flowers)), is a word from the phrase, 'Setsugetsuka no toki mottomo kimi wo omou (I remember you especially when snow, the moon or flowers are beautiful)' in an old Chinese poem, 'In Kyoritsu ni yosu (A poem sent to In Kyoritsu)' composed by Juyi BAI.
雪月花（せつげつか、ゆきつきはなとも）は、白居易の漢詩「寄殷協律」の一句「雪月花時最憶君」による語。