- Congrats to Our 2026 Calendar Photo Contest Winners!Iowa One Call (IOC) is thrilled to announce the winners of our 2026 Calendar Photo Contest. Hosted in honor of National Safe Digging Month, IOC invited photographers of all levels to capture and submit photos that showcase the quintessential spirit of the great state of Iowa – and you delivered!… Read more: Congrats to Our 2026 Calendar Photo Contest Winners!