From 05.12.2016 0:00 to 05.12.2016 23:59 you can find on item shop:
20% Discount:
Petbook Chest - Price: 104 (129) DCs
Itemname: Horse Sugar - Price: 40 (49) DCs
Itemname: Trading Glass - Price: 32 (39) DCs
On sale:
Windshoes+ - Price: 179 DCs
Chest of the North - Price: 35 DCs