1870 Census record calculates year of birth to be ca 1863.

1900 Census, Luzerne Twp., Fayette Co., PA
Acklin, John B., b. Dec. 1866, 33, single, b. PA, parents b. PA, farmer
Martha, sister, b. May 1872, 28, single, b. PA, parents b. PA
Bowers, _________, servant, b. June 1850, 50, widowed, b. PA, parents b. PA, housekeeper