昼夜 ちゅうや逆転 ぎゃくてんでしょう
chūyagyakutendeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 昼夜逆転

1. Probably a reversal of day and night.; Likely sleep-deprived.

Polite
Presumptive
Conjecture