During this event, in addition to the regular tasks that you have on the left, you need to complete Express and Epic tasks to earn points for the Seasonal Pass.   
   
Each level of the Pass gives you great rewards, including useful resources, unique decorations and others! Besides, you can also buy the Golden Ticket, that will unlock you even more rewards and additional useful perks!

Keep in mind that this event usually lasts for 21 days, so don't forget to keep track of time.