Write a short story set on 20 May 20, with a surprise ending that it was all a dream.

Here is an example story:

On the morning of 20 May 20, Leo woke up to find his room filled with miniature, glowing hot air balloons. Each balloon carried a tiny, friendly creature waving at him. He floated out of his window on a cloud, joining a parade of these whimsical beings through the sky. They visited a city made entirely of candy and then soared above oceans where fish flew like birds. The adventure was exhilarating, filled with laughter and wonder. As the sun began to set, a gentle breeze carried him back to his bed. He closed his eyes, feeling the soft pillow beneath his head. When he opened them again, the room was normal, and the date on his digital clock still read 20 May 20. He smiled, realizing it had all been a magnificent dream.