It really depends. Was there some kind of thought-up end date? So what, it's running late. Otherwise a common approach is to cut scope, deliver fewer features

It really depends. Was there some kind of thought-up end date? So what, it's running late. Otherwise a common approach is to cut scope, deliver fewer features than initially planned. If somebody asks you to work overtime, ask them how you'll be compensated. Factor 1.5 pay for overtime? An extra week of payed vacation? Get that in writing! If the expectation is to do it just to keep your job or "for the company", I'd say start looking for another job. And no matter what, don't risk burnout. No amount of pay is worth that. If it's too much, either ignore the pressure, or if you cannot, quit immediately.