How many days can you take without going outside?

Say, you have your internet and food and all the necessary supplies to live for a month without going out of your house. You could peek outside your window but just see trees, no people. You don’t hear much. As a matter of fact, there was a storm and you hardly felt it since you were at the basement doing stuff. You know the world goes by outside but you don’t feel any of that. You don’t want to go out unless you finish this work which has a deadline in a month. How may days could you do it?