Alliance for Christian Media/Day1 is a nonprofit mainline Protestant media ministry based in Atlanta, GA. The major outreach of the organization is the production of Day1, a weekly radio program hosted by Peter Wallace which features outstanding preachers from across America representing the mainline churches.

Day1 has an affiliate network of more than 200 radio stations from coast to coast and in 8 other countries. It has aired weekly since 1945 (formerly as "The Protestant Hour").

The program's website at Day1.org offers program podcasts, sermon transcripts, video interviews and features, a robust blog, and more.

The organization has also been instrumental in producing Emmy-winning TV programming such as "The Lion the Witch and the Wardrobe" and "Shadowlands."