Looks like Steam Game Festival will be a frequent event, as Steam owner (and sometimes video game maker) Valve announced it’s coming back for February 2021.
The Steam Game Festival will see over 500 games from the PC platform offering limited-time demos. Some may be carry-over from past Festivals, but expect to see demos for upcoming games as well.
Steam Game Festival February 2021 will start on February 3 and lasts until February 9.