HELP: sale in Paris & Milan. i need info...

  1. so yeah i was basically planning to go to both places around the end of summer but havent pick any date as yet.i hope you guys can help me by sharing any infos especially, when actually the 'sales' period starts (this is soo important coz i need to plan for my flight); where is the best place to go; accomodation...mostly anything!!

    i do appreciate any thoughts. thanx!!