T3Fun started a new Play Time Event for Silverane Costume Set (usable by Daria) for American server during August 01-31, 2014. The body costume and hair costs 1,000 and 1,200 points respectively. Spending 10 minutes in-game earn 1 point, so you would need an average of 71 points (~12 hours) per day to get both items.
The other random rewards include:
The previous Play Time Event was in March 2014.