2003년 화색과 잎의 광택이 우수하고 절화장이 길며 다수성인 품종 "Saphia"를 모계로 절화장이 길며 다수성이지만 잎이 약하고 흰가루병에 약한 품종인 "Bridal Beauty"를 인공교배 하여 얻은 실생계통 42주에 대하여 2004~2005년에 1차선발을 하여 1계통을 선발하였으며, 2006~2008까지 3차에 거쳐 특성검정을 실시한 후 최종 선발 된 '원교 D1-1008'을 2008년 농작물 직무육성 신품종 선정위원회를 거쳐 "Snow Day"
A new standard rose cultivar "Snow Day" was bred from the cross between pink standard cultivar "Saphia" and pink standard cultivar "Bridal Beauty" at the National Institute of Horticulture & Herbal Science. The cross was made in 2003 and "Snow Day" was finally selected in 2008 after evaluating characteristics for three years from 2006 to 2008. A white standard cultivar, "Snow Day" grows vigorously and resistant to powder mildew. The major characteristics of this cultivar are 152 stems/m2/year in yield, 81.8 cm in length of cut flower, 11.3 cm in flower diameter, 29.2 in petal number, and 13.7 days in vase life. This cultivar can be propagated by both cutting and grafting. The consumer's preference for this cultivar is relatively higher than that for the control cultivar, "Tineke".