the SEC deadlines. Filings filed after 5:30 PM are "received" the next day. So anything after that should be viewed as not meeting today's deadline.
If a filing due date falls on a weekend or SEC holiday, the filing is due on the following business day. The EDGAR system hours of operation for submitting files are 6:00 a.m. to 10:00 p.m. Eastern Time, weekdays, excluding Federal Holidays. Files submitted after 5:30 p.m. Eastern (with the exception of Section 16 filings) will receive the next business day's filing date.