Thanksgiving is a holiday celebrated by many people in the United States and Canada. In the United States it is celebrated on the fourth Thursday in November and marks the start of the Christmas season. Some people celebrate Thanksgiving to remember the first harvest of the pilgrims and puritans, groups of people from England who immigrated to North America in the 1600s. Some people recreate the first Thanksgiving and dress up as pilgrims, puritans, and the Native Americans who are said to have helped the new arrivals find food to survive their first winter. Most people, however, see Thanksgiving as one day a year to reflect upon what they are thankful for. Some families will sit together and take turns saying aloud what they are thankful for. An important part of Thanksgiving is families coming together. Extended family members often travel long distances to share the day with their loved ones. In the United States Thanksgiving is the busiest travel day of the year. People travel in planes, trains, buses, and cars to share a very special meal - Thanksgiving dinner. What most Thanksgiving celebrations have in common is the food. On Thanksgiving many families prepare large, elaborate dinners to share with friends and loved ones. Many of these dinners use ingredients associated with the fall harvest, like cranberries, potatoes, sweet potatoes, corn, and blueberries. Roast