Do you want to do random older content in Final Fantasy XIV to earn a grab bag of odd rewards for familiar content or new Namazu earrings? If so, then somehow the Moogle Treasure Trove event is exactly what you were looking for. If you weren’t looking for it, on the other hand… well, you’ll still be able to take part just the same. Clear specific duties without cheesing them via undersized parties and you’ll earn Irregular Tomestones of Philosophy, which can be exchanged for prizes from moogles in the three major cities.it runs from May 30th until the release of patch 5.0; you needed to do something with that chunk of time, right?
Source: Official Site