The largest cruise line operator has a big earnings report to announce before the next opening bell.This may be the lull before earnings season starts up in earnest in a few weeks, but that doesn't mean that there's a moratorium on financial updates. Carnival (CCL 0.80%) (CUK 0.88%) reports its fiscal third-quarter results before the market opens on Monday.The final trading day of the month -- and quarter -- won't be sleepy. Carnival's report covers the months of June, July, and August. This is the peak tra ...