It can never be opposite day. When ever you say "HEY IT'S OPPOSITE DAY!" the opposite would apply therefor it would not be opposite day. Also if you say "IT'S NOT OPPOSITE DAY!" the affect is not applied.
👌 I would fuck him 🍆 💦 then I'd get him pregnant 🤰 👶 and we'd raise our own little baby 👨👨👦 👦 and play fortnite with him 🎮 ⌨️ xd