Marco, the whole idea of holiday setting is to either as you say hide your listings (close your shop) or have the ability to leave your shop open but tell sellers you are away and let them see the data I am back and then add the delivery time on. 

It is not the estimated delivery as you say, I was away for 10 days. My usualy dispatch is 2 days with 2 - 3 days delivery. So not sure how on the 17th a estimated delivery of the 26th can be shown?