During the height of the French Revolution, there was a complete revamping/retooling of French culture and religion: A new calendar based on the metric system and marking the significant events and principles of the Revolution as holidays; dismantling the corrupt institutions of Roman Catholicism (personified by such figures as Lomenie de Brienne, Archbishop of Toulouse, during latter part of the reign of Louis XV) and replacing them with state sponsored 'Constitutional' clergy, and eventually even a new religion of the Deist persuasion, to replace Catholicism, etc.
But these innovations and reforms did not persist, although IMO they seem quite ingenious and in tune with modern beliefs and sensibilities. Thomas Carlyle in his "History" derides these innovations, but I myself find them quite palatable in many ways.
So - what happened to those innovations and reforms? In particular: the new French Deism and the metric calendar.
Why/how did they fall by the wayside? Did the Thermidorian Reaction just shove them aside? (Judging from what Carlyle writes, that seems the most likely.) Did Napoleon do away with it all? Did the force of historical inertia simply cause the French to revert to their old ways?