十五

fifteen / 15

ten / 10

five / 5

twenty four dynastic histories (or 25 or 26 in modern editions)

see 躲得過初一，躲不過十五|躲得过初一，躲不过十五[duo3 de5 guo4 chu1 yi1 , duo3 bu4 guo4 shi2 wu3]

lit. you may go undetected during the new moon, but at full moon you'll be found out (idiom) / fig. you can't put it off forever / sooner or later you'll have to deal with it