When was the Bill of Rights proposed?

The Bill of Rights was proposed in 1789 and ratified in 1791. However, if we focus on when the first Congress, which convened in 1789, formally proposed the amendments that would become the Bill of Rights, the year to note is indeed 1789, but 1788 refers to the debates surrounding the ratification of the Constitution itself rather than the proposals made concerning the Bill of Rights.

In this context, while the year 1791 is significant as the year when the Bill of Rights was officially ratified and came into effect, the answer pointing directly to when it was proposed should be recognized as 1789. The question could be more accurately referencing the time of proposal rather than the ratification, which clarifies the significance of the actual event of proposing amendments to the Constitution that formed the Bill of Rights.