I stayed up all night wondering where the sun went.

This brilliant little groaner is a masterclass in wordplay, specifically the pun. The entire joke hinges on the double meaning of the phrase "it dawned on me." In everyday language, it's an idiom for having a sudden realization or understanding something. But in the context of someone wondering about the sun, the phrase takes on a very literal meaning: the sun actually appeared at dawn, ending the night. The humor comes from the perfect, silly collision of these two meanings.

It’s the kind of joke that feels like it was born in an elementary school science class. The setup sounds like a genuine, if slightly clueless, question someone might have before learning about the Earth's rotation. We all had that moment where we learned the sun doesn't "go" anywhere, our planet just spins. This joke perfectly captures that simple, "aha!" moment of understanding, turning a basic astronomical fact into a punchline that is both groan-worthy and undeniably clever.