When you boss makes a product decision in a meeting and never tells the team or me the lead dev. Then when it comes to an overview day he gets angry that I didn't know about these changes cause he never told us or put it in the sprint. So I have to spend my weekend refactoring the whole website so make it work the way he wants.....

Just do nothing, and tell him to communicate next time he probably cannot force you to overwork

"My boss screwed up my project, so I lost my weekend fixing his mistake."

Never give up your free time because of someone else's incompetence.

@Codex404 @Root You two are right but when they want to demo the product to a potential big client kinda feel like I need too 😬. But don't get me wrong I'll take Thursday and Friday to make up for this.

@UrbanChrisy take at least three days off... You might have had plans which had to be canceled, and even if thats not the case weekend time is way more valuable than work time.
You really should tell your boss: you fucked up, if you are willing to give me a five day weekend I am willing to cancel my plans (white lie) to finish the product for the customer.

This shows your initiative to help him solve the issue and you are prepared to do work in free time but at the same time that he cannot do that again because you are standing up for your right to a weekend.

That’s called a MONDAY problem!
I get this from time to time, someone will make a decision and fail to mention it.

Complain on Friday that said feature hasn’t been started, your response should be nothing more then “create a ticket, and I’ll look at it on monday”