Notes on the 27th Amendment:
The date of September 25, 1789, is correct. The amendment was initially ratified by 6 states (MD, NC, SC, DE, VT, VA), and the other 8 states excluded, omitted, rejected, or excepted it. The amendment was ratified by various states over time, and in 1992 was fully ratified as an amendment to the Constitution.
For more information see: United States. The Constitution of the United States of America : with a summary of the actions by the states in ratification thereof ; to which is appended, for its historical interest, the Constitution of the Confederate States of America / prepared and distributed by the Virginia on Constitutional Government. Richmond : Virginia Commission on Constitutional Government, 1961. 94 p.