Valve may have not announced them yet but the details necessary to prepare our wallets for Halloween, Autumn and Winter sales have arrived.
Steam sale dates are usually a decently kept secret and don't leak too early. However, the latest set of leaks nabbed the dates for the three big upcoming sales in 2021.
According to the data acquired by SteamDB, Halloween Sale is the next big one on the menu and as you probably figured out by now, it will run around Halloween - from October 28 to November 1, 2021.
Autumn sale is the one that will follow but it will be longer as it will last a full week, from November 24 to 30.
Finally, the Winter sale will go on for two weeks, from December 22, 2021, to January 5, 2022. Keep in mind that this is the one where you are most likely to buy a bunch of games since these are the holidays when no one is working and everyone is in the spending mood. Plan and save accordingly.
As we already mentioned, these dates and durations have not been officially announced by Valve but SteamDB's info has proven reliable for years so there isn't much reason to start doubting it now.