Right now, the dominant ordering is with the US Constitution. Thus most historians and public officials declare Massachusetts as the 6th state. What they mean is that Massachusetts was the sixth state to ratify the US Constitution.
However, Massachusetts was the 9th state of the original Union. Only if, only if the Articles of Confederation would have been more effective form of government; then we would remember Massachusetts's original rank as the 9th state of the USA. In fact the official name of the United States of America (USA) was specified under the Articles of Confederation, not the US Constitution.
Consequently the hour dedicated to Massachusetts begins at 6:09 AM.