General discussion, page-20186

"The earnings reports are expected after the end of a company's first three quarters, and both quarterly and annual reports are due after their fiscal year (FY) ends. The fiscal year-end for many companies is not the same as the calendar year-end."

"The timing of earnings reports varies a little depending on the details. The old standard required that companies must file earnings reports no later than 45 days after the end of their first three quarters, and both quarterly and annual reports are due no more than 90 days after their fiscal year ends."

Trusty old Google.