While the bidding closes on Jan 20, we've got until Feb 14 to get the stuff finished and sent/posted. Also, if you think something you're potentially making would take longer than that, you can say so in your comment, or you can wait until the next auction round starts, which will have a later deadline.

Either way, the earrings you're describing sound super cute :) Whether you make those or something similar/less time consuming, I'm definitely going to consider putting in a bid ♥