Reviewing - date from no where?
United States—Enlisted and Officer Muster Rolls and Rosters, 1916–1939 [Part J][M3WD-GP3]
I've run into this before. A date or "blank" is a required entry. For this batch a date of Sep 30, 1918 was entered but that date is not on the document therefore "blank" should have been entered. Note that the series of names start with number 6. Perhaps the indexer did the names 1 through 5 and the date was on that page?
Should I change the date to "blank" or accept the date as is.