Quiet Period is a common term. The Wikipedia definition is
The quiet period prohibits management teams or their marketing agents from making forecasts or expressing any opinions about the value of their company. For publicly-traded stocks, the four weeks before the close of a business quarter is also known as a quiet period.
Now the Dumb Ass period is different. That started the day Koos was born and ends the day we all get to celebrate his next step towards a reincarnation.