Dragons are assumed to be myth or somewhat a legend in someway in Fairy Tail. They also disappeared in Fairy Tail. But what was the reason behind them disappearing. We have seen in an episode that Grandeeney and Igneel are still very much alive, but seem to look as though they are in hiding. Also what's up with all dragons disappearing on the same day and the same year?
Answers are appreciated :). If there's anything from the manga, please include in answer. I do not think they have covered it in the anime.