16:18 is a Christian podcast by Nathan John Whittaker, a missionary in Romania working with the local church in an effort to further evangelize their community. Out of the need for greater education on many social, cultural, political and religious issues, he started 16:18 in order to better equip the church, and the individual Christian, to more effectively evangelize their unique, and local communities.

In each episode, released every Tuesday and Friday, Nathan discusses many of these issues that Christians, including himself, face today in the public square and how they can more effectively evangelize as they better understand the fallen world in which we all live. In certain special edition episodes, Nathan also interviews Christians in different professional arenas, and from all walks of life, such as businessmen, doctors, theologians, and educators as they offer differing perspectives on how all Christians can evangelize past the public/private divide.