From 14.09.2016 0:00 to 14.09.2016 23:59 you can find on item shop:
20% Discount:
Feather of Lovers (7d) - Price: 10 (12) DCs
Feather of Lovers (15d) - Price: 18 (22) DCs
Feather of Lovers (30d) - Price: 32 (40) DCs
On sale:
Unicorn (15d) - Price: 99 DCs