Elfstedentocht
This is kind of the equivalent of the Superbowl for the Dutch, but due to global warming it hasn't been held in 24 years. The previous longest interval was 22 years, so some people are starting to doubt whether it will ever happen again.<p>Imagine if the real Superbowl wasn't held in 24 years due to global warming and may never happen again, perhaps then it would be more of a priority.