Hello :)

I am a newbie in the general discussion forums. Hi :)
I wanted to ask someone is there is a possible next date of sales and discounts at GOG? I want to make my wallet be ready for that :D

Check this thread: https://www.gog.com/forum/general/gog_sales_historical_dates_and_forecasts/page1

Every day there are some offers.

There are Weekly sales. Weekly sales also get new additions on Friday, usually.
There are thematic sales every now and then. Like the Lovecraft Birth Anniversary Sale, which is currently going on.
There are special sales occasionally, such as the ongoing PIÑATA sale.
Then there are a handful of large sales around the year, like Summer Sale etc. with free bonus games, xp collection etc.

So effectively sales are ongoing yearlong. Just keep your eyes open for the deal you want.
Tip: Check the Historical Dates and Forecasts thread suggested to you.
Another Tip: Wishlist the games you would want, and GOG will usually send you a mail (to the mail id you registered with) when your wishlisted titles are put on sale.

Also, Welcome to the forum. :)

Thank you very much guys :)
I gonna be attentive to the possible dates as described in the thread.

Check here if you're interested in finding all current discounts - sometimes a particular game discount won't be announced, or will get lost in the white noise:

https://www.gog.com/games?price=discounted&sort=popularity&page=1