Giveaway
The exchange of gifts is a recognized way to express appreciation or thanks at any time. Giveaways are not necessarily ceremonial but accompany a variety of community events. There is the more formal Giveaway ceremony that you might see at a Powwow or social gathering where one family offers gifts to many members of the community in order to share their "wealth" or good fortune and to give thanks - or a Giveaway can be a more personal, informal kind of sharing between two people.