2yaht fohng yeh fohng, gāa chaahk nàahn fohng 日防夜防，家賊難防 — [one can defend night and day but it is hard to defend against a thief from one's own family] it is difficult to defend against a dishonest or treacherous insider (hhssm 5.55).
3yaht gwóng yaht baahk 日光日白 — in broad daylight (used when something bad is done in the public eye).
4yaht ngàain yeh ngàain 日捱夜捱 — to work hard night and day, to suffer through working long hours (gwdl 47, 22).
5yaht ngòh yeh ngòh 日搵夜搵 — [day nag night nag] to nag day and night, cf. ngòh h/ngó 搵.
6yaht pàaih 日牌 — an elder brother (OS).
7yaht táu mh hou góng yahn, yeh màan mh hou góng gwái 日頭唔好講人，夜晚唔好講鬼 — [by day don't talk about people, by night don't talk about ghosts] used when someone one has been talking about or gossiping against appears. "speak of the devil and he comes running" (st 3, 18).