Have a nice day is surely a promising candidate between classic logos, due to its accuracy in terms of weight and shapes.
Have a nice day represents in a perfect way the unity of a modern logo with a traditional one, making it everlasting.
The logo Have a nice day Is executed in such a precise way that including it in any place will never result a problem.
Have a nice day is a perfect sample of how a logo turns up to be a clear distinctive of its brand.
The key to success of Have a nice day is the stength of its color range, that breaks the space turning it into main protagonist.