The usual is to get time off in lieu for working weekends.
It's sometimes unavoidable to work on weekends - e.g., a tight deadline. But I would ahead of time get the agreement in writing that the weekend work is going to be given back in time off in lieu after the deadline - otherwise, don't work weekends. there needs to be a feedback loop (via money or capacity) to management. Otherwise they'd just see amazing results, and keep wanting more. That's how you end up in a permanent crunch job.
It was avoidable, just not by you. That's not your problem though - it's your bosses' problem. Letting them make that your problem is a choice for you, but I would posit it is a poor choice.
It's sometimes unavoidable to work on weekends - e.g., a tight deadline. But I would ahead of time get the agreement in writing that the weekend work is going to be given back in time off in lieu after the deadline - otherwise, don't work weekends. there needs to be a feedback loop (via money or capacity) to management. Otherwise they'd just see amazing results, and keep wanting more. That's how you end up in a permanent crunch job.