It's the feeling of dread hanging over you when you have to go to work on a federal holiday because your company skimps on holiday pay and only offers the "6 major holidays". This is usually triggered by seeing your spouse still in bed as you head out the door to work. Holidaze may be accompanied by bitterness and envy.
Sara didn't want to go to work today. She made lots of noise getting ready to rouse her sleeping husband, kicked the cat, and silently prayed for a cable outage so that her husband would be bored all day. Sara has a serious case of holidaze.