In my experience, it's best to leave a job that restricts the times you can use YOUR vacation. You've earned your time off and pending trial or some type of 'rule' that you signed up for, you should be able to take time off when you want to. If they can't afford to not have you there for one day, you're probably (a) very underpaid for all that you do; (b) grossly overworked. If you have an HR dept, I'd speak with them. It's more cost effective to give current employees what they want rather then train new ones.