Millennia are made of centuries and decades, centuries of decades and years. Years are months, months of weeks, but not precisely. Days are made of hours, but what do we call the several imprecise periods in a day: morning, noon time, afternoon, evening, night?
I.e., answer this riddle, for which I have no answer: Days are made of these, which are themselves made of hours. What are they?
Best Answer
I would say that the periods of a day are simply time periods. For example, the definition of morning time says it is:
You could also call them periods. The definition of evening says:
Edit: A more specialized term, used in broadcast programming, is dayparting. That is,
You could adopt this term for the use you seek, although many people would not know its precise origin. The individual parts of the day could be termed dayparts.