So on Steam when there's a winter sale or summer sale they bring back some of the most popular deals on the last day. Does GoG do this as well?

Good question.

I guess it is common, but not guaranteed.

In fact it's common for gog to bring back *all* the deals... I don't know whether it's guaranteed or not. But why wouldn't they?

I think the bundle deals will all show up on the last day. Not sure about the individual game deals, there are already repeats like Witcher 3, Dreamfall and Age of Decadence.

Thanks for the replies everyone. Looking at Star Wars Galactic Battlegrounds Saga. It's only six bucks but if I can get it cheaper it feels like a game in and of itself. I know it was on sale the first day but was not aware of the sale occurring.

The bundles coming back is almost a certainty...
The individual Daily Deals... not as certain...likely, but not definite. I'd expect them to reappear at least once more as a daily if they do not re-appear all together though. So repeats from today, may not reappear again.

From the sale's FAQ: "All daily deals and bundles change every 24 hours, but they may come back later."
Based on this and past experience, I would expect all bundles and most daily deals to return on Friday.

yes, probably