Working hours not allowing me to set 12am-12am

I am trying to set up working hours for this site as following:

Sun-Mon (12am-12am) - Break Time (2am-8am)

The system is only allowing me to at the very most set it to 12am-11:45pm which leave that slot busy for those wanting to book a one hour session at 11am, thus rendering that slot useless and unbookable. Is there any way to make sure we can flush the working hours from 12am-12am? This is mission critical for this site.

Thank you!
Eric Gomez Webmaster