Since always. It has, however, at times been called the Exploration Sale.
Steam has four seasonal sales a year; here's the general layout of them:
https://www.steamgifts.com/go/comment/43e7O7G
Comment has been collapsed.
Nomination: The “Defies Description” Award is glitched right? shows up an error when you try to nominate a game.
Comment has been collapsed.
728 Comments - Last post 9 minutes ago by spodamayn
304 Comments - Last post 13 minutes ago by RobbyRatpoison
2,047 Comments - Last post 57 minutes ago by WaxWorm
70 Comments - Last post 1 hour ago by devotee
54 Comments - Last post 1 hour ago by David2330
357 Comments - Last post 2 hours ago by thenevernow
15,355 Comments - Last post 3 hours ago by MarvashMagalli
17 Comments - Last post 2 minutes ago by Devil231
35 Comments - Last post 3 minutes ago by SyrslyTwitch
257 Comments - Last post 4 minutes ago by InSungShinGwan
65 Comments - Last post 7 minutes ago by Valmar666
82 Comments - Last post 8 minutes ago by RobbyRatpoison
36 Comments - Last post 10 minutes ago by SyrslyTwitch
15,098 Comments - Last post 13 minutes ago by adam1224
https://www.whenisthenextsteamsale.com/
Comment has been collapsed.