Neither! Chariot racing was a popular sport from Homeric Greece (≈01200 BCE, during the heyday of the military chariot itself) through to Classical Greece, Imperial Rome, and Byzantium until at least 00600 CE, for instance, and that's neither "purely ceremonial" nor "transportation". I think the closest modern analogy is horseback riding, which is done almost entirely for recreational and ceremonial purposes nowadays, but is a popular hobby among the wealthy and the rural.
But, unlike horseback riding, chariots were never a practical means of long-distance travel. They have no suspension, they have no seats, they have no cargo space, and they don't stay level. At any time period, if you're traveling all day in a chariot, it's because the chariot is in one place and you want it to be somewhere else, perhaps for a battle or a race. If you and the driver just wanted to get there yourselves, you'd just ride the horses and leave the chariot back home in the stable.