Certainly, but it should obey the hours you've given it. You could set a reminder before your concert to adjust the "Active hours" as it calls them. I currently have it set for 8am-8pm, which covers me most of the time.

You could set your hours to the times when you most often have concerts. I just wish they'd allow more than a 12 hour window. I assume they figure that they'll have the greatest chance of catching the computer turned on, but I'd much rather have it get more forceful about the updates over time like it used to do. I leave my computer on all the time anyway. I wish I could set active hours for 4am to 3am the next day or something.