Native American Heritage Month is indeed in November, and has been since 1915. Dr. Arthur C. Parker, a Seneca Indian, who was the director of the Museum of Arts and Science in Rochester, N.Y., was the one who got it started by convincing the Boy Scouts to celebrate it first as a day. Later it was expanded to a month.
Then there is also Hispanic Heritage Month, which begins on September 15, the anniversary of independence for five Latin American countries, and which can be and is celebrated by many Native Americans who are also Hispanic.
May is Asian Pacific American Heritage Month, which encompasses not only the Chinese, but also the Japanese, the Hawaiians, the Guamanians, the Koreans, and now the Vietnamese who have become Americans.
If anyone here is in the military you will see poster displays put up for the various heritage months in places such as the on-base clinic, the Exchange, or the Morale, Welfare and Recreation Command.