That means the 8-K should appear on Edgar at around 6:00 am tomorrow
The EDGAR system hours of operation for submitting files are 6:00am to 10:00pm Eastern Time, weekdays, excluding Federal Holidays. EDGAR filings must occur by 5:30pm ET (when the SEC officially ends its business day) to receive the same-day filing date. Filings submitted between 5:30pm and 10pm will receive the next business day’s date.