My advice isn't based on your current situation (since there isn't much we can do about that now) but just how I got to the point where I feel ok saying no. La

My advice isn't based on your current situation (since there isn't much we can do about that now) but just how I got to the point where I feel ok saying no. Last year I worked on a project and because of my mistakes it looked like we weren't going to hit our deadlines. I did not want others to have to suffer because of my mistakes so I made sure to work late (some days as late as 1AM) to make sure that our deadline was hit. Nobody asked me to do that but I didn't want others to suffer. We didn't hit our deadline but weren't too far off and people were overall ok with the situation as we were just headed into beta for the internal users. I'm pulled off that project and put on a new project, which is to work on something that literally made my previous months of effort obsolete. It was the project to completely replace the application that I worked extra on. Fast forward a few months and I am given a project that had a super aggressive timeline, which I didn't think could happen and I was told my estimate wouldn't be communicated out and I worded my estimate poorly thinking I covered my ass when I didn't and my estimate was communicated out. I was pressured hard to work nights but I pushed back and then I got to a point where I relied on another team and I couldn't get any further without them. It turns out nobody had actually verified that the other team had the functionality we needed (it was critical to what I was working on) and the other team hadn't even started working on the functionality that we needed. That was the straw that broke the camel's back, especially since they were wanting me to work the weekend before I brought up the fact that we don't have the pre-reqs even done and nobody from management actually verified we were ready to start. Since then I have pushed back on all attempts to get me to work late hours. I have seen mismanagement from terrible timelines to straight out lying to business people about things that are done when the work hasn't even started. Nothing changes if everybody keeps working late to hit crazy deadlines and management isn't affected at all if we do hit the deadlines as they aren't the ones taking time away from their personal life. I have worked late a few times since that incident but it was because I lost track of time working because I was just so focused or because the delay was completely on me and I wanted to fix it so others downstream weren't affected