Irish Canadians
The first waves of Irish immigrants took place between 1763 and 1880. when ten thousand Irish immigrants arrived on the Island. From 1800 to 1850, "10,000 immigrants from every county in Ireland" had settled in Prince Edward Island and represented 25% of the Island population by 1850.
American cuisine
The Irish arrived in America in a rather woeful state, as Ireland at the time was often plagued by some of the worst poverty in Europe and often heavy disenfranchisement among the masses: many of them arrived barely alive having ridden coffin ships to the New World, sick with typhus and starvation. In addition, they were the first to face challenges other groups did not have: they were the first large wave of Catholics. They faced prejudice for their faith and the cities of Philadelphia, New York, and Baltimore were not always set up for their needs. For example, Catholic bishops in the U.S. mandated until the 1960s that all Catholics were forbidden from eating red meat on Fridays and during Lent, and attending Mass sometimes conflicted with work as produce and meat markets would be open on holy days; this was difficult for Irishmen supporting families since many worked as laborers. Unsurprisingly, many Irishmen also found their fortunes working as longshoremen, which would have given their families access to fish and shellfish whenever a fisherman made berth, which was frequent on the busy docks of Baltimore and New York. Though there had been some activity in Baltimore in founding a see earlier by the Carrolls, the Irish were the first major wave of Catholic worship in this region, and that meant bishops and cardinals sending away to Europe for wine. Part of the Catholic mass includes every parishioner taking a sip of wine from the chalice as part of the Eucharist. Taverns had existed prior to their emigration to America in the region, though the Irish brought their particular brand of pub culture and founded some of the first saloons and bars that served stout and red ale; they brought with them the knowledge of single malt style whiskey and sold it. The Irish were the first immigrant group to arrive in this region in massive millions, and these immigrants also founded some of the earliest saloons and bars in this region, of which McSorley's is an example.
It was also in this region that the Irish introduced something that today is a very important festival in American culture that involves a large amount of food, drink, and merry making: Halloween. In England and Wales, where prior immigrants had come from, the feast of All Hallows Eve had died out in the Reformation, dismissed as superstition and excess having nothing to do with the Bible and often replaced with the festival of Guy Fawkes Night. Other immigrant groups like the Germans preferred to celebrate October 31 as Reformation Day, and after the American Revolution all of the above were less and less eager to celebrate the legacy of an English festival when they had fought a very bloody war to leave the British Empire. The Catholicism of the Irish demanded attendance at church on November 1 and charity and deeds, not just faith, as a cornerstone of dogma, and many of their older traditions survived the Reformation and traveled with them. Naturally, they went door-to-door to collect victuals for masked parties as well as gave them out, like nuts to roast on the fire, whiskey, beer, or cider, and barmbracks; they also bobbed for apples and made dumb cakes. Later in the century they were joined by Scots going guising, children going door-to-door to ask for sweets and treats in costume. From the Mid Atlantic this trend spread to be nationwide and evolved into American children trick-or-treating on October 31 wearing costumes and their older counterparts having wild costume parties with lots of food and drink like caramel apples, candy apples, dirt cakes, punch, cocktails, cider (both alcoholic and non,) pumpkin pie, candy corn, chocolate turtles, peanut brittle, taffy, tipsy cake, and copious buckets full of candy; children carving jack-o-lanterns and eating squash derived foods derive from Halloween's heritage as a harvest festival and from Irish and Scottish traditions of carving turnips and eating root vegetables at this time of year. Their bobbing for apples has survived to the present day as a Halloween party classic game, as has a variation on the parlor game of trying to grab an apple hanging from the ceiling blindfolded: it has evolved into trying to catch a donut in one's teeth.