In a word, no. Liverpool have every right to request that they don't play that day, but no club should be able to dictate these things, as that could give unfair advantage. As others have said, there are plenty of other tragic disasters in football history, yet other clubs don't EXPECT to not play on anniversaries. Hillsborough is different because of all the cover up, and the quest for truth, which keeps it alive, helped by fans' slightly twisted desire to share in the grief in order to feel like part of something, even though they had no link at the time. If Hillsborough didn't have the cover up, then it would have been put to bed, and it would be remembered like any other tragedy in which people lost their lives. Please don't take that as disrespectful of the dead, and the families seeking the truth. I hope eventually they get it, and find some peace. Only then can the whole thing be put to bed, and remembered with respect. Sorry if that is offensive to anyone, but that is my opinion.