That means that every week between September 29, 2014 and Christmas there will be a sale. Each week will vary as to what's on sale.
Week 1 has the WHOLE shop on sale! Swing by and see what deals you can find. Be sure to check back weekly to see what is on sale each week.
You can either just pop into the Etsy store or follow HomeStudioPendants on Facebook to get the weekly update.