So... we're not exactly looking at the original source.
As the indictment is prepared by a prosecutor, the act of accepting a filed document does not involve much action by a court. Given that many courts how provide for around-the-clock electronic filing, the fact that a particular document is filed outside of regular court hours could simply mean that's when the party who prepared the document hit a "submit" button on their computer.Quoting Ron El
An "information" is a document prepared by a prosecutor that presents the essence of a charge against a defendant. It can be contrasted with an indictment, which is essentially the same thing but issued by a grand jury.
The filing of an information is not an act of judicial decision-making. (And the Supreme Court doesn't put in a night shift.)

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