There is a custom of eating noodles as a feast of hare and ke (sacred-profane dichotomy) in some areas, and somen is sometimes served in or after a celebratory event such as a wedding ceremony.
それに「ハレとケ」の食物として麺類が用いられる風習が一部にあり、結婚式等の祝い事の席やそれが終わった後に素麺が振舞われる事がある。