yī​rì​zhī​chángyī​rì​zhī​zhǎng

slight superiority

一日之长 一日之長 yī​rì​zhī​cháng
slight superiority
A slight advantage or being slightly better in talent or ability than someone else
一日之长 一日之長 yī​rì​zhī​zhǎng
slightly older or more experienced
A humble expression used to describe being slightly older or having more experience than others; literally being older by a single day