If the concert is a sprite (or whatever really), then only load it if your conditions are met.
Considering that you are alluding to the fact that the content might change dynamically, you might be able to do it without coding. If you are remote loading images for the concerts, technically if you do it right, you could just name the remote files something like 'Concert20190301.png' and then load based on substrings.
Compare int(mid(filename,8,8)) > 20180302
There are potentially a number of other ways to achieve it too, it really depends on how your system is structured.