OAK BROOK, ILL. — McDonald’s Corp. said global comparable sales increased 3.1% in May and 4.4% year-to-date. System-wide sales for restaurants worldwide increased 12%, or 4.7% in constant currencies, during May.

“McDonald’s ability to connect with consumers and deliver the menu choices, everyday affordability and experience that is in tune with today’s lifestyles has been the cornerstone of our ongoing sales momentum,” said Jim Skinner, chief executive officer. “The modernization of our restaurants, coupled with menu innovation and enhanced accessibility of our brand continues to deliver the unique McDonald’s experience that is resonating with our customers around the world.”

U.S. comparable sales at McDonald’s were up 2.4% on the launch of the frozen strawberry lemonade, the popularity of the fruit and maple oatmeal and the continued demand for McDonald’s signature beverage and core offerings, the company said.

European comparable sales were up 2.3% led by performance in France, Russia and the United Kingdom. Premium menu offerings such as McWraps and the 1955 burger and limited-time food events contributed to the growth. Also in May, McDonald’s said comparable sales increased 4.3% in Asia/Pacific/Middle East and Africa with notable strength in China. Breakfast and lunch value offerings and convenience initiatives drove sales in Asia and Africa.