Every day between 4:00 PM - 20:00 PM UK Time.
Throughout the event, you can obtain Blessed Chests, and from them, you can get Vouchers that offer Dragon Coins.
Dragon Coins can be obtained for purchasing any item from the server's Item Shop.
For more information, please visit the Events section on the Wiki.
Dragon Coins obtained in the game or at events can be used to purchase any item from the Item Shop.