Turn over a new leaf

Meaning

Make a fresh start or change behavior for the better.

Usage

Used when someone reforms.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

From book pages (leaves) to symbolize starting anew.

Used in moral writing since the 17th century.