It's in store only and not everything is on sale (in other words, forget about getting a discounted chyc cabas). I do not know when the sale ends. I found out about it through an email I received from YSL.
I was in the boutique tonight and an SA told me the sale will continue through December and into January. He said they will have additional mark downs, so not everything that will go on sale is on sale yet.
Hi sammi, I think I did see jewelry on sale but I don't usually look at jewelry so my attention span wasn't focused on it. it would be best to check with one of the boutiques to see if what you want is on sale.