OAK BROOK, ILL. — McDonald’s Corp. on June 8 said global comparable sales increased 4.8% in May and 4.5% year-to-date. System-wide sales for restaurants worldwide, meanwhile, increased 5.5%, or 6.2% in constant currencies, during May.

“May marks another month of sustained sales growth, demonstrating the ongoing appeal of McDonald’s unique combination of convenience, value and variety,” said Jim Skinner, chief executive officer. “Our focus on enhancing the McDonald’s experience through affordable food choices, modernized restaurants and relevant marketing is giving customers even more reasons to visit McDonald’s.”

U.S. comparable sales at McDonald’s rose 3.4% behind the recent addition of Frappes to the McCafe line-up and the popularity of the Shrek-themed Chicken McNugget and Happy Meal promotions.

European comparable sales were up 5.4% due to positive results in France, the United Kingdom, Germany and Russia, while comparable sales climbed 5% in Asia/Pacific/Middle East and Africa.