In this case eligibility would not be a factor.

"• All students are academically eligible during a school holiday of a full calendar week or more. When the bell rings to dismiss students for the December holidays, all students are academically eligible until classes resume in January. The same is true for summer recess and fall and spring breaks provided those breaks consist of at least a full calendar week. (See example at the end of this document.)"

As long as the break is the full week and the even starts after the bell rings then you should be good. However, if you have to take them out of school in order to travel to the event then you wouldnt be able to do that.