The Year One Celebration Event takes us back to Craglorn, theImperial City and Wrothgar. Craglorn came as an addition to the base game back in 2014, on May 22nd. the Imperial City and Wrothgar were released in August and November of 2015, which makes it all the first content that was released in ESO.
With the Year One Celebration, you will be able to earn plenty of rewards, as there will be double drops in all of these zones, as well as the golden Glorious Year One Coffer when you complete your first daily in these zones. For participating in any activity of these zones, such as killing bosses, you will also receive a purple Year One Coffer! These have the chance to drop some items from former events, such as the Orsinium DLC event and the Imperial City event from past years. You will also be able to earn double rewards for defeating world bosses and delve bosses, killing bosses in the Maelstrom or Dragonstar arena, killing bosses in any of the three trials in Craglorn (Aetherian Archive, Hel Ra Citadel or Sanctum Ophidia), double Tel Var stones from enemies in the Imperial City, killing bosses in the White Gold Tower and Imperial City Prison dungeon, and get double yield from any harvesting node in any of the three zones.
Other rewards you can get are: