What should be my excuse? -

I am working on my consulting business, but currently have a 9 to 5. What I want to do is push my hours back to a 12 to 8pm and work on gaining clients from 8am to 12. The nature of the business and the hours that my current job is open make it a viable work schedule but I cant tell my boss I m changing my hours so I can work for myself. So what would be your excuse to change your schedule?

If the business will support your hours, you shouldn t need an excuse . Just tell your boss you would prefer to work from 12 to 8, and see if he will consider it. Otherwise, say you are taking a morning class (and hope no one ever asks about it).