Thursday is the day when the maximum number of people order late-night pizzas in New York.
According to a survey by online restaurant ordering site Delivery.com, the most pizzas are ordered after 10 p.m. on Thursday, and the the city's topping of choice is pepperoni, the New York Post reported.
"Thursdays were surprising to us because Sunday is our busiest delivery day overall," said company vice president Jonathan Mark.
"Friday and Saturday people go out to eat, but Sundays, because of football, I always think of as a pizza night."
Pizza experts were not shocked that pepperoni is the favourite topping.
"Despite our unique toppings, like Italian black olives or Porcini mushrooms, pepperoni is still the most popular topping," said Margaret DeMarco, of Di Fara Pizza.
"There will never be a day we don't sell a slice of pepperoni pizza. It's a familiar topping, it's spicy, delicious and it's bad for you. The worse it is for you, the more people will like it," she said.