Mark your calendars! McHappy Day is coming back on Wednesday, May 6. On McHappy Day, your order is more than a meal, it’s a chance to give back! McDonald's Canada and its local, independent franchisees will be donating a portion of the proceeds from all food and beverage menu items on May 6th towards Ronald McDonald House and other local children’s charities. The funds raised on McHappy Day provide critical support for tens of thousands of families staying at Ronald…