I would think they would be more focused on attributing results to accurate dates and times since they should be performing statistical analyses themselves, though they may be tracking that information internally.
I will wait until tomorrow to see what the French release next for new case numbers.
But releasing data all on one day after waiting a week means that the cases are not being added at the right rate. Same thing happens with recoveries.
I am happy to back-add them once I see the overall pattern. Given the nature of viral infection, it's highly improbable they all got sick on the same day.
Yesterday there were 5,233 new confirmed cases.
The figure of 18,000 new cases corresponds to the cases (confirmed or suspected) in nursing homes since the beginning of March.