What would the world look like if everyone were loving for just one day?

What if we woke up today and everyone (in the whole world) was respectful, cheerful, and sincerely loving to one another? What if, just for one day, we all made decisions based on the impact of others rather than greed, money, etc.? Would this have a significant impact on the world even if it was just a day? What do you think would happen in the days after?