This is the first time I've seen someone beg for Monday to arrive XD

I know, right?

Fun fact: We all love GOG sales, esp. the big ones. :-)

• there's no new Weekly Sale (often starts at midnight CEST)
• most of sales end in 12 hours (Mon/Tue midnight)
• there are 2 sales (Whale and Arcade Classics) ending in 36h (Tue/Wed midnight)

I'd guess not earlier than tomorrow, but we'll see.
Today's launch would be a day before Steam (which should be better for GOG, I suppose).

Or there is one that just started a bit late, ending late on the 31st :/. Either it will overlap the big sale or they are waiting until after halloween. Flash deals are ending in not quite three hours so I'm still thinking there is a decent chance the big sale will start then.

Behold the weekly sale

Very underwhelming

"Weekly sale
21 hours 53 minutes left"

Quite interesting duration for a weekly sale started on Monday, isn't it? :)

Seems like an error, the announcement states the sale will last until the 31st.

You're right, but I still think that the mistake is here for a reason :)

Another sale would be a neat surprise. :)

Is there going to be a Halloween Sale this year?

According to this post, yes.

There should have been a Halloween horror sale that lasts from October 29 to November 3.

This week.
Tomorrow or Wednesday.

:)