Here Are the Dates of the Next Three Steam Sales:
Steam Halloween Sale: October 26th 2017 - November 1st 2017
Steam Autumn Sale (over Black Friday): November 22nd 2017 - November 28th 2017
Steam Winter Sale: December 21st 2017 - January 4th 2018
Fonte:http://www.kotaku.co.uk/2017/10/20/steam-sale-black-friday-halloween-winter-dates