You left out the part that, that is for SEC filings. Not Alternative Reporting on OTCMarkets.
If one takes the time to confirm the "FRINA" rules on filling deadlines, ONE would find the following:
The FRINA rule for a filling deadline that falls on a weekend is to extend the deadline to the next business day. This means that if a filing deadline is due on a Saturday, it will be extended to the next Monday, provided that Monday is not a holiday. If the next Monday is a holiday, the deadline will be extended to the next business day after the holiday. This rule applies to all deadlines that fall on a weekend or a legal holiday, ensuring that deadlines are not missed due to the weekend or holiday.