While pottery was featured in the eighth anniversary it once again appears again as a traditional gift category of the ninth anniversary.

/17 Cary, North Carolina 7/13/17 Cortland, New York 7/20/17 Fresno, California 7/17 Avon, Indiana 8/1/17 Petaluma, California 8/17 Corona, CA 8/17 Dillon, Colorado 8/17 Downer’s Grove, IL 9/4/17 Cedar City, Utah 9/5/17 Walla Walla, Washington 9/9/17 Yonkers, NY 8/17 Winchester, VA 9/15/17 Simi Valley CA 9/15/17 Westlake Village CA 9/30/17 Mechanicsburg PA 10/28/17 Altoona, PA 10/1/17 Valparaiso, IN 10/17 State College, PA 10/17 Kyle, TX 10/9/17 Bemidji, MN 10/17 Dallas Timber Creek Crossing 10/13/17 Missoula, MT 10/21/17 San Antonio (Bandera) 10/21/17 Lubbock, TX (Slide Rd) 11/9/17 New Braunfels, TX 11/17 Mountain View, CA 11/17 Beaver, WV 11/17 Lewisburg, WV 11/17 Wausau, WI 11/27/17 Rochester, MN 11/17 West Jordan, UT 11/17 Lehi, UT 12/17 North Little Rock, AR 12/12/17 Troy, MI 12/17/18 Santa Maria, CA 12/17?

Historically, the age of consent applied to male-female relationships; same-sex relationships were often illegal regardless of the ages of participants.

To verify the accuracy of the method, several artefacts that were datable by other techniques were tested; the results of the testing were in reasonable agreement with the true ages of the objects.