When did Canada East gain responsible government?

British authorities granted responsible government to the Province of Canada, which included Canada East, in 1848.12

Following the 1841 Act of Union, which merged Upper and Lower Canada, the British initially refused to grant responsible government to ensure continued control over the elected assembly. However, after sustained pressure from reformers in both Canada West and Canada East, and a desire to transfer administrative costs to the colonies, the British government relented. The principle of responsible government was realized under the Reform administration led by Robert Baldwin and Louis-Hippolyte LaFontaine, who were returned to power in 1848.123