: It'll pop up with the daily login. Click the highlighted day to open. if you've missed a day it costs 3 RC to open that window. Open all the windows to get the reward pictured at the top of the calendar.
Personally, I'd like any of the above. If a harvestable decoration, please do one that gives gasoline. If a machine, one that makes 10 gasoline from, say, 100 of one set item in a one trade in --> 10 gas out fashion, like the juice machine. If an animal, one for the new farm, please. Both the whale and the octopus listed above are great ideas. Or, perhaps, something else entirely--31 RC, perhaps (one for each day of the month). Or, since it's October, something with a Halloween theme to any of the above.
Thanks for taking the time out of your busy day to read all these. We all know you're swamped with all that has to be done on this game. Thanks for a great game! ~Byrony