holiday light displays

When is it ok to Light up Holiday Displays?
When is it ok to Light up Holiday Displays?
When is it ok to Light up Holiday Displays?
Everyone has an opinion about when the Holiday season should begin.  It seems that it starts earlier and earlier each year with retailers putting out holiday decor even before Halloween.  In my house, we have always had the rule of not lighting up our outdoor Christmas lights until the day after Thanksgiving.  What do you think?