McDonald's wants its customers to eat more—day or night, home or abroad.
If you're a night owl, you can now get pancakes or hash browns to go with your Big Mac.
And if you live in Japan, how about the Mega Potato? A serving twice as big as the large fries it already serves and at a belt-busting 1,142 calories, big enough to satisfy a Sumo wrestler.
The new offerings at McD's come as the world's biggest hamburger chain is trying to drum up more business after a string of disappointing monthly sales blamed on higher beef prices, penny-pinching consumers and intense competition.
McDonald's global same-store sales—sales at stores open at least 13 months—fell in January for the first time in nine years. The decline has continued as the global economy remains sluggish and competition has heated up from fast-food rivals such as Burger King and Wendy's.
Although revenue in the first quarter of this year was $6.61 billion—up from $6.55 billion a year earlier—sales at established stores across the globe fell 1 percent.
(Read More: Consumer Caution Takes a Bite Out of McDonald's)
Hence the changes to get more hungry people coming into the famous Golden Arches.
Starting this month, the company said participating 24-hour restaurants in the United States will offer an "After Midnight" menu that includes some breakfast favorites. Customers also will be able to mix items to create "Midnight Value Meals," with either fries or hash browns as their sides, McDonald's said in a statement.
The company says the "After Midnight" menu is already available in North Delaware, Del., and College Station, Texas.
"Our customers want convenience around the clock, and we're making it easier to eat at McDonald's with more 24-hour restaurants open than ever before," said McDonald's spokeswoman Ofelia Casillas.
Meanwhile, in Japan, where the company already sells a Gracoro Burger, which contains a deep-fried patty made from macaroni, shrimp and white sauce, now comes the "Mega Potato."
At 1,142 calories—more than two Big Macs—the giant package of fries costs 490 yen ($4.89) compared with 300 yen for the standard large serving.
But the company was quick to note that the item is not meant for a single diner, but is for eating family-style.