Wiktionary
turning over a new leaf
vb. (present participle of turn over a new leaf English)
Usage examples of "turning over a new leaf".
He had been graver than usual of late, but very pleasant, and when jokingly accused of turning over a new leaf, he answered soberly, “.
Because I foolishly thought that you might be turning over a new leaf.
It would be bad enough if they welcomed this gesture of turning over a new leaf, but it would be worse if they sneered.
He wondered if he had been wrong about Harold turning over a new leaf.