Eliminate the ability to enter concerts with future date-stamps.
Why create a database of things that never happened? Eliminating the ability to add concerts with future dates will help with creating a more accurate database. Concerts with future dates can be cancelled and, I’m sure that you're aware, you now have a database of events that have been cancelled onward from mid-March 2020, into the unforeseeable future. I highly doubt that users are returning to now-cancelled entries to delete them, and I also doubt that that will change. What is the value in having a database filled with cancelled events?
Removing the ability to add concerts with future dates would certainly make for a better user experience.
Many users (including me) get a lot of value out of having their future concerts in Concert Archives so they can keep track of their upcoming events, announce them to friends, and they don’t forget to add them afterward.
I agree with your point about dealing with cancelled events but we’ll probably need to solve that in a different way rather than excluding future events.
Definitely a worthwhile discussion though :)
It appears there's four votes in favor of having future concerts:
Ric Kilmer commented
BoxRec.com has a similar feature: allowing entry of future events that may be canceled. However, its software automatically deletes that entry after X amount of time has passed since the scheduled event if no one does anything to confirm it.