https://www.cnet.com/news/steam-summer-sale-2018-may-kick-off-today/ > Kiss your cash goodbye. Steam will kick off its 2018 Summer Sale on Thursday, according to a tweet from a reliable source. > "Steam Summer Sale will begin in 24 hours," wrote Steam Database, which isn't affiliated with Valve, at 1:04 p.m. EST (6:04 p.m. GMT) on Wednesday.