They will celebrate the event with a family dinner.
Their family is also honoring the couple with a card shower. Cards and greetings may be sent to them at P.O. Box. 192, Merrill, Iowa 51038.
Walter Macklem and Bonnie McLain were married Aug. 26, 1950, at Hinton United Methodist Church in Hinton.
Their children are: Doug and Paula Macklem of Terra Haute, Ind., Mary and Terry Guffy of Bronson, and Sue and Pat Birks of Sioux City.
The couple has six grandchildren, Weston Macklem, Jamie Macklem, Stacy (Guffy) and Cody Meyer, Travis Guffy, Stephanie (Birks) and Tyler Hoppe and Ashley Birks, and seven great-grandchildren.