There is no week in which God does not demand that we live holy. We are to live holy always. Everyday of the year is expected to be holy with us. We should not indulge in sin on any day. We should maintain a holy lifestyle every day.
There is no week that is not holy. There is no week that God is not present. Every week is supposed to be holy. God does not say we should be holy on some days of the year and some weeks then live our lives the way we like in the other weeks.
The belief of the holy week is not biblically correct. There is no week that is not holy. If we say that one week is holy, then it means that the other weeks (about 51 weeks are only). That implies that we can do our sinful habits in those weeks. But that is not correct. There is no week which is to be taken as unholy. God expects us to live holy everyday.
Every week is holy before God