The vast majority of judicial decision making does not occur while court is in session. Consider the Supreme Court. All of their deliberations are made in private and then the decisions are put in writing and published. They do no make their pronouncements from the bench.
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.)
Can't vouch for Montana, but around here the lowest level of the judiciary works 24 hours. They take turns having the duty and there's typically only ONE judge on duty at night, but it's possible to have charges accepted by the court at any hour.
However the "information" in Montana and federally is actually the statement of charges by the prosecutor. It doesn't even need a judge to be "filed," just transmitted to the court somehow.
What makes you think that the legal process is obligated to work during business hours? There's no constitutional or other precedent that would imply this.