Two reports that disagree about last month's revenue are worse than one report nobody trusts, because each is defensible on its own terms and there is no way to falsify either.
The discipline that prevents it is dull and absolute: the night audit freezes a snapshot when a day closes, and every report over that period projects the snapshot rather than recomputing the numbers from the underlying rows.
That is also why reports filter on the stamped business date rather than the clock. A payment taken at one in the morning belongs to the previous operating day, and a report that used the wall clock would disagree with the audit for every transaction between midnight and rollover — every single night.
Where a report legitimately wants clock time — an hour-of-day view of when the dining room is busy — it says so explicitly, because that is a question about the clock rather than about the trading day.