There is no requirement to pre-announce a date for earnings. They are due on a specific date (45 days after quarter end or 60 days after fiscal year end for the annuals). If a company can't meet that date they file an NT to get an automatic 5 day extension.
Assuming BBIG had only a quarter end and not fiscal year end on 9/30, the quarterly financials are due 11/15.
When companies pre-announce a date, they are usually doing it to get the date and time for the related conference call out to the public.
I don't know whether BBIG has held earnings calls in the past or not.
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