Ms Project 24 Hour Calendar Not Working. I am trying to get ms project to recognize a work shift that starts in the evening of one calendar date and ends in the morning of the next calendar date. If your project's regular working schedule doesn't map to any of the available base calendars, you can change the working days and times for your project so that work gets scheduled.

To define unique or specific exceptions to a. It sounds like you are trying to change the scheduling calendar for your project.