闰余成岁 (閏餘成歲) rùn yú chéng suì

rùn yú chéng suì phrase extra days fill out the years
Domain: Literary Chinese 文言文 , Subdomain: , Concept:
Notes: Quote: from 千字文 “Thousand Character Classic” (Amies 2021 tr.; see also tr. by Sturman, n.d.)