When did port and starboard change?

The terms "port" and "starboard" have their origins in Old English, with "starboard" referring to the right side of a ship (derived from "steerboard," the side with the steering oar) and "port" referring to the left side, which became standardized later to avoid confusion. The term "port" was adopted to replace the older term "larboard," which was similar in sound to "starboard" and could lead to misunderstandings. This change is believed to have occurred in the 19th century, around the time of increasing maritime trade and navigation standardization.