The first day of McDonald's national roll-out of its all-day breakfast is here, but before you get your hopes up, here's what you can and can't order. 
 
 The long-awaited menu for breakfast fans will vary by location. For those who love McGriddle sandwiches, you're out of luck. That item isn't a part of the all-day breakfast menu in any markets, so you'll be skipping on those 450 to 570 calories. Bagel sandwiches, cinnamon melts and "Big Breakfast" platters aren't included in the all-day menu either. 
 
 1. In most markets, you can order: 
 
 - sausage burrito 
 
 - "Fruit ‘N Yogurt" parfait 
 
 - "Fruit & Maple" oatmeal 
 
 - hash browns 
 
 - hotcakes 
 
 - hotcakes with sausage 
 
 Susanna Kim/ABC News 
 
 2. In markets that offer McMuffins, you can't get the Egg White Delight or the steak, egg and cheese McMuffin, but you can get: 
 
 - egg McMuffin 
 
 - sausage McMuffin with egg 
 
 - sausage McMuffin 
 
 3. In markets that offer biscuits, you can't order the "southern style" chicken biscuit, but you can order: 
 
 - bacon, egg and cheese biscuit 
 
 - sausage biscuit with egg 
 
 - sausage biscuit ||||| McDonald’s Corp. will experiment with serving breakfast all day at some San Diego-area locations as Chief Executive Officer Steve Easterbrook seeks to pull the restaurant chain out of a U.S. sales slump. 
 
 The test, slated to begin next month, will keep hash browns, Egg McMuffins and other sandwiches on the menu beyond the standard breakfast hours, Lisa McComb, a spokeswoman for the Oak Brook, Illinois-based company, said in an e-mailed statement. 
 
 McDonald’s is the fast-food breakfast leader, and the morning menu accounts for about 25 percent of the company’s business. As more Americans eat breakfast away from home, competitors such as Taco Bell and Starbucks have tried to take market share from McDonald’s with expanded offerings. Breakfast foods are some of the most popular items on McDonald’s menu, so the all-day test makes sense, Mark Kalinowski, an analyst at Janney Montgomery Scott LLC, said in a research note. 
 
 “Arguably, the two most craveable items on the McDonald’s menu are its french fries and breakfast items such as various McMuffin permutations and the utterly delicious McGriddles,” said Kalinowski, who’s based in New York. “Having those breakfast items available to sell all day would also serve as a reminder to customers (and the media and Wall Street) that McDonald’s does indeed have craveable food to sell.” 
 
 The shares rose 0.9 percent to $97.88 at the close in New York. McDonald’s has climbed 4.5 percent this year. 
 
 Customers have long called for McDonald’s to serve breakfast all day, but, as Kalinowski points out, the company has said its kitchen grills aren’t big enough to cook its entire menu at the same time. 
 
 McDonald’s didn’t specify how many restaurants would participate in the breakfast test. 
 
 “We look forward to learning from this test, and it’s premature to speculate on any outcomes,” McComb said.
– The highly anticipated all-day breakfast menu at McDonald's is debuting nationwide Tuesday, but not everyone's morning favorites have made the cut, ABC News reports. Those who are jonesing for the chain's hash browns, hotcakes, fruit and yogurt parfaits, oatmeal, and sausage burritos are in luck—as are those who want a plain egg or sausage McMuffin and most egg-and-biscuit sandwiches. What aren't included: two specialty McMuffins (the Egg White Delight and the steak-egg-cheese variety), the "Southern style" chicken biscuit, bagel sandwiches, cinnamon melts, and, alas, the maple-infused concoction known as the McGriddle. And those who have a huge appetite may need to supplement their breakfast sandwich with a Big Mac as the day drifts by: "Big Breakfast" platters aren't an all-day offering, either. (There's something else you should know about McMuffins.)