It is stated in our employee handbook that vacations have to be scheduled at managements discretion or something like that. We tell everyone up front that vacation time cannot be taken at peak times. However, once I did allow one employee to take vacation at that time of year. To compensate we try to schedule holidays where at least one of our techs gets four days off if a holiday falls on Monday, Tuesday, Friday, or Saturday. Once a month one of our techs has a scheduled three day weekend. We do this by rotating days off. Once a month a tech will have Saturday off this week and Monday off next week which gives them a long weekend. If a holiday falls on Monday, Tuesday, Friday, or Saturday the lucky tech has a four day weekend which is very popular.