3 Block of time & longer work hours


I am trying to setup 3 blocks of time daily for space rental, it would be 7am to 12pm, 12pm to 5pm and 6pm to 12am. So the blocks of time are around 5 hours each, which I have added in the settings. However the start times I have available are limited, I only have 5 options. I need Working hours to be 7am to midnight with an hour break between 5 & 6pm. None of those time are options for me to choose. Why don’t all hours of the day appear on working hours? How can I set those hours?