is it bad luck to leave christmas decorations up

No, it's not bad luck to leave Christmas decorations up after the holiday season is over. In fact, many people like to keep their decorations up for a few extra days or even weeks to enjoy the festive atmosphere for as long as possible. Some people even leave their decorations up all year round as a reminder of the joy and warmth of the holiday season. So, feel free to keep your decorations up for as long as you like!