### Clue: Warn eye make-up will require change at end of date (3,4)
### Answer: NEW YEAR 
 ### Explanation: Definition: will require change at end of date
 **Anagram of**(… make-up) WARN EYE.
Defn: What will require you to change the last part of a date in general. Unless it's in the form "yyyy-mm-dd".