Nonsense. JSON (or "JSON++") can define any arbitrary primitives. Someone already made the arbitrary decision to have boolean values instead of "true" and "fals

Nonsense. JSON (or "JSON++") can define any arbitrary primitives. Someone already made the arbitrary decision to have boolean values instead of "true" and "false" strings; having timestamps is merely another arbitrary decision. You seem to believe that the primitives in JSON are some sort of platonically pure form. They were merely a choice, and a that choice could be improved.