In my understanding, images last much longer than just their intended purpose, I keep this in mind when I do any design work. This mentality pushes me to create a quality design as much as possible. A great way of thinking that makes sets the bar for all future work.
Line-up times were crafted to be first and foremost informational as well as visually appealing, Keeping in mind that this is the main marketing push, anything done half-heartedly will likely jeopardize the entire event and how many people are actually willing to attend.