Below is a Christams news of Martial Heros from The Official Site. Please enjoy it.

Event 1: To Bring back Stanta?s gift
The Christmas season has arrived in EMH World. Santa has brought gifts from North Pole for EMH, however the monsters stole the gifts, and they hidden it through out the EMH World. Every EMH user should kill monster and bring back the gifts. When you defeat monster(Lvl36+), Gift box will be dropped randomly.
When you R-mouse click the Gift box, you will receive a quest. After you finish the quest you will get the Santa?s gift which has various items.

Period: Dec 6th - Dec 19th

Event 2: To find Christmas tree

Christmas trees will spawn every hour in EMH World(expect all Deneons) When you destory Christmas tree, you can get exp and various items will be dropped.

Period: Dec 19th - Dec 26th

More Info Here