i work a neighboring/surrounding agency to OP. We are on 4-10 Hr workday schedule, with set off days. I love it.
At my last agency it was 5 days, with 8 hours and 2 mandatory to claim OT hours a day (don't ask about that shady shit). Combined with the hour long commute to and from my duty station it was not uncommon for supervisors to tell agents to take a "mental health" day.