To be over the moon means to be extremely happy about something.
The expression comes from the nursery rhyme Hey Diddle Diddle, where the cow jumps over the moon. Over time the phrase came to describe a feeling of happiness so strong it seems to lift someone far above the ground.
The expression comes from the nursery rhyme Hey Diddle Diddle, where the cow jumps over the moon. Over time the phrase came to describe a feeling of happiness so strong it seems to lift someone far above the ground.
She was over the moon when she heard she had been accepted into the program.