In observance of National Hamburger Day, hamburgers at McDonald\u2019s in Milford will only be 59 cents on Sunday, Dec. 21. The burgers usually sell for about $1.29. For the health conscious, McDonald\u2019s points out that the McDonald\u2019s burger has only 240 calories. McDonald\u2019s restaurants in Connecticut and Western Massachusetts will participate, offering the specially priced burgers from 11 a.m. to 7 p.m. There is a limit of four per customer. \u201cOur classic hamburgers are made from a juicy 100% beef patty simply seasoned with a pinch of salt and pepper, tangy pickles, minced onions, ketchup and mustard,\u201d according to the company\u2019s website.