Depending on his housing situation, the typical phone times are 6am - 9:30pm, but this is for general population. Some inmates have a phone in their cell and can call 24/7.
https://www.inmateaid.com/ask-the-inmate/hi-this-question-is-for-crowley-county-correctional-facility-in-olney-springs-co-it-is#answer
Accepted Answer Date Created: August 15,2016