#NationalPizzaDay trending on Twitter today
On the day the USA celebrated a holiday dedicated to pizzas, #NationalPizzaDay was a top global Twitter trend on Wednesday. US President Obama tweeted a photo with pizzas tweeting, "Say cheese. #NationalPizzaDay".  Australian actor Rahart Adams tweeted, "I told myself I should go to the gym today; I even signed up to one. But it's national pizza day sooooo #NationalPizzaDay".