Define working times in a 24 hour calendar

Hi there,

I'm trying to setup a 24 hour calendar that runs 2, 12 hour shifts with 30 minutes of non working time at the end of each shift.

Can the calendar be set up to include these times or is it best to set the working times for the resources?

I have created 2 resources for the project called:

"DayShift" and 'NightShift"

I have tried to set the working times for "Night Shift" to start at 18:00 and finish at 05:30 but it keeps changing the start time to 04:30

Cheers

Jeremy